VAN KAMPEN TRUST FOR INVESTMENT GRADE CALIFORNIA MUNI
N-30D, 1998-12-17
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<PAGE>   1
 
                    TABLE OF CONTENTS
 
<TABLE>
<S>                                               <C>
Letter to Shareholders...........................  1
A Farewell from the Chairman.....................  6
Glossary of Terms................................  7
Performance Results..............................  9
Portfolio of Investments......................... 10
Statement of Assets and Liabilities.............. 13
Statement of Operations.......................... 14
Statement of Changes in Net Assets............... 15
Financial Highlights............................. 16
Notes to Financial Statements.................... 17
Report of Independent Accountants................ 21
Dividend Reinvestment Plan....................... 22
</TABLE>
 
VIC ANR 12/98
<PAGE>   2
 
                             LETTER TO SHAREHOLDERS


November 20, 1998
 
Dear Shareholder,
    The past decade has been a
remarkable time for investors.
Together, we've witnessed one of the
greatest bull markets in investment                       [PHOTO]
history, unprecedented growth in mutual      
fund investing, and a surge in personal
retirement planning. The coming
millennium promises to hold even more
challenges and opportunities.              DENNIS J. MCDONNELL AND DON G. POWELL
    To lead us into this new era of
investing, we are proud to announce
that Richard F. Powers III has joined
Van Kampen as President and Chief
Executive Officer, and will assume the additional role of Chairman of Van Kampen
in 1999. He comes to us from our parent company, Morgan Stanley Dean Witter &
Co., where he served as Executive Vice President and Director of Marketing. Dick
Powers brings 27 years of experience in the financial services industry,
including vast expertise in product management, strategic planning and brand
development. While at Morgan Stanley Dean Witter, he developed many of the
firm's core products and services.
    You'll hear more from Dick Powers in the coming months as he becomes
increasingly involved in matters related to your Trust and joins Dennis
McDonnell in addressing shareholders in future reports. (See Don Powell's
farewell to shareholders on page 6.)
 
ECONOMIC OVERVIEW
    After two years of solid gains, the U.S. economy began to lose some of its
luster during the reporting period. No longer immune to the global economic
turmoil, the economy retreated from a 5.5 percent annual growth rate in the
first quarter to a tepid 1.8 percent in the second quarter (as measured by gross
domestic product). By the third quarter, however, growth rebounded to a 3.3
percent annual rate.
    A strong dollar was largely responsible for moderating economic growth. As
the Asian financial crisis worsened and spread to other regions, foreign
investors amassed dollar-denominated U.S. Treasury bonds. These purchases sent
the dollar sharply higher, which increased the price of U.S. exports and slashed
the price of imports--resulting in reduced demand for U.S. goods and services
abroad. In light of the reduced demand and global economic problems, corporate
earnings fell, business investment declined, and stock prices plummeted. By the
end of August, the Dow Jones Industrial Average was down 19 percent from its
record high, set in mid-July. Although the stock market has since recovered much
of its losses, consumer confidence has declined and growth in consumer spending
has slowed.
    Concerns about further economic deterioration, weakness in the stock market,
and a potential credit crunch prompted the Federal Reserve Board to cut
short-term interest rates 0.25 percent in late September. It was the first rate
cut in almost three years and was
 
                                                            Continued on page  2
 
                                        1
 
<PAGE>   3
 
followed by additional cuts of 0.25 percent in October and November. Despite
these rate cuts, the Fed took care to note that inflation was well contained.
    California's economy continues to be strong, with strong job growth, falling
unemployment, and an improved financial position. In October, Moody's Investor
Services upgraded California's general obligation-debt rating to Aa3 based on
the state's broad-based economic recovery. A potential cloud on the horizon,
however, is the effect of Asia on California's economic growth. Economists
throughout the state are projecting a deceleration of growth but not a major
slowdown.
 
MARKET OVERVIEW
    The volatility in overseas markets and U.S. stocks was a boon to bonds.
Foreign investors bought U.S. Treasury bonds in an attempt to escape the global
turmoil, while domestic investors purchased them to avoid further losses in U.S.
stocks. Because these purchases occurred at a time when the supply of new
Treasury issues was declining, Treasury bond prices soared.
    The Fed rate cuts propelled bond prices even higher. Following the Fed's
first rate cut, the yield on the 30-year Treasury bond, which moves in the
opposite direction of its price, dropped to a record low of 4.72 percent on
October 5. However, subsequent sales of Treasuries by Asian and institutional
investors dampened the rally. As of October 31, the 30-year Treasury bond had a
5.15 percent yield, down 1 percent from a year ago.
    Municipal bond prices followed Treasuries higher, but, as usual, they didn't
gain nearly as much in price. The yield on a typical AAA-rated general
obligation municipal bond fell only 32 basis points to 4.80 percent as of
October 31, from 5.12 percent a year earlier. Earlier in October, municipal bond
yields topped comparable Treasury bond yields, which is a rare event. Municipal
bonds generally yield less than Treasury securities because their interest
payments are exempt from federal and sometimes state and local income taxes.
    During the past year, municipal bonds were burdened by an excess of supply
relative to demand. State and local governments, taking advantage of the
market's low interest rates, issued $230.9 billion worth of long-term bonds
during the first 10 months of the year--34 percent more than they had issued
during the same period last year. Approximately 44 percent of the new issues
were refinancings of older, higher-yielding bonds. However, new issuance slowed
recently as the number of bonds eligible for refinancing shrank.
    Despite an abundant supply, many investors were reluctant to purchase
municipal bonds because of their generally low yields. Compounding the situation
was the abundance of insured issues, which accounted for almost 60 percent of
the new supply. The dominance of insured bonds reduced the supply of
lower-rated, higher-yielding bonds and narrowed the yield spread between
higher-and lower-rated bonds. (The insurance relates to the timely payment of
principal and interest, when due, on the bonds. The insurance does not protect
the bonds from market risk.)
 
                                                            Continued on page  3
 
                                        2
<PAGE>   4
 
[CREDIT QUALITY PIE CHART]    
 
Portfolio Composition By Credit Quality*
As Of October 31, 1998

<TABLE>
                                                              
<S>                      <C>
AAA..................    70.80 
AA...................     2.60
A....................    10.10
BBB..................    10.60 
BB...................     1.70
Non-Rated............     4.20
</TABLE>

* As a Percentage of Long-Term Investment
Based upon the highest credit quality ratings as issued by Standard & Poor's or
Moody's.

 
TRUST STRATEGY
    We used the following strategies to manage the Trust during the period:
    We maintained a portfolio consisting largely of high-quality bonds with a
heavy emphasis (over 70 percent) on AAA-rated insured securities. AAA-rated
bonds generally have performed better than lower-rated securities when interest
rates are falling, which was the case for most of the reporting period. Under
current market conditions, we also believe the narrow yield spreads between
higher- and lower-rated bonds means that investors are not adequately
compensated for the additional credit risk associated with lower-rated
securities.
    We limited our new acquisitions because current market yields were lower
than the average yields of bonds in the portfolio. However, some of the Trust's
holdings were called away by issuers who took advantage of lower interest rates
to retire or refinance their outstanding debt. We replaced these bonds with new
long-term securities and extended the call protection of the Trust. Because the
supply of California bonds was extremely high during the reporting
period--through the first 10 months of 1998, the state was the nation's second
largest issuer of debt--there were plenty of options from which to choose in
selecting new securities to add to the portfolio. Since the yields of these
bonds were lower than those of the bonds that were replaced, the Trust's income
obtained from coupon payments was reduced during the reporting period.
    In making purchases, we emphasized long-term discount bonds with maturities
near 25 years. In an environment of falling interest rates, these bonds have the
potential to appreciate in value faster than premium bonds because they have a
longer duration, which makes them more sensitive to changing interest rates.
Discount bonds helped offset the declining duration of the portfolio that
occurred as low interest rates caused some of our higher-coupon holdings to be
prerefunded, or priced to call dates. Housing bonds were particularly vulnerable
to prerefunding, because many homeowners sought to refinance mortgages as
interest rates continued to decline.
    As of October 31, 1998, the duration of the Trust was 6.94 years, compared
with 8.20 years for the Lehman Brothers Municipal Bond Index (California bonds
only). Because of the longer-term nature of the Trust, the calculation of this
index's duration has been
 
                                                            Continued on page  4
 
                                        3
<PAGE>   5
 
adjusted to eliminate bonds with maturities of five years or less. In addition,
because the Trust invests primarily in California bonds, we have taken the
California bonds from the Lehman index and used them to calculate a benchmark
duration for the Trust.
 
               Top Five Portfolio Sectors as of October 31, 1998*
 
                    Retail Electric/Gas/Telephone...........16.2%
                    Transportation..........................13.4%
                    Tax District............................11.5%
                    Health Care............................. 9.0%
                    Single-Family Housing................... 8.9%
 
                    *As a Percentage of Long-Term
                    Investments
 
PERFORMANCE SUMMARY
    For the 12-month period ended October 31, 1998, the Trust generated a total
return of 15.46 percent.(1) This reflects a gain in market price per common
share from $16.75 on October 31, 1997, to $18.00 on October 31, 1998, plus
reinvestment of all dividends. The Trust had a tax-exempt distribution rate of
5.50 percent,(3) based on the closing price of the Trust's common shares.
Because income from the Trust is exempt from federal and California income
taxes, this distribution rate is equivalent to a yield of 9.48 percent(4) on a
taxable investment (for investors in the combined federal and state income tax
bracket of 42 percent). Please refer to the chart on page 9 for additional
performance numbers.
 
                         [DISTRIBUTION HISTORY GRAPH]]

Twelve-Month Distribution History
For The Period Ended October 31, 1998
 
<TABLE>
<CAPTION>
                                      Distribution per Common Share
                                      Dividend         Capital Gain
<S>                                       <C>               <C>
Nov 1997.............................     $.0825
Dec 1997.............................     $.0825             $.2535
Jan 1998.............................     $.0825
Feb 1998.............................     $.0825
Mar 1998.............................     $.0825
Apr 1998.............................     $.0825
May 1998.............................     $.0825
Jun 1998.............................     $.0825
Jul 1998.............................     $.0825
Aug 1998.............................     $.0825
Sep 1998.............................     $.0825
Oct 1998.............................     $.0825
</TABLE>

The distribution history represents past performance of the Trust and does not
predict the Trust's future distributions.



 
                                                            Continued on page  5

 
                                        4
<PAGE>   6
 
ECONOMIC OUTLOOK

    We believe the economy will continue to grow at a moderate rate for the
remainder of the year, supported by low interest rates. The housing industry has
already benefited from the sharp decline in interest rates, and other sectors
could follow if consumer and business spending picks up.
    Looking ahead into next year, we see the potential for stronger economic
growth as long as domestic interest rates remain low and the global financial
crisis stabilizes. We believe the current low inflationary environment in the
United States paves the way for further Fed rate cuts if the economy resumes its
slowdown.
    Overseas, we see some promising signs of recovery, including Japan's new
bank reform package, which includes a willingness to let problem banks fail, and
approval of an International Monetary Fund rescue package for Brazil.
    We will closely monitor these global and domestic events and their effects
on the performance of the Trust, adjusting the portfolio when appropriate. We
remain committed to the goal of providing a high level of tax-exempt income
while preserving shareholders' capital. Thank you for your continued support and
confidence in Van Kampen and the management of your Trust.
 
Sincerely,
 
[SIG]
Don G. Powell

Chairman
Van Kampen Investment Advisory Corp.
 
[SIG]
Dennis J. McDonnell

President
Van Kampen Investment Advisory Corp.
 
                                                  Please see footnotes on page 9
 
                                        5
<PAGE>   7
 
                          A FAREWELL FROM THE CHAIRMAN
 
                          ------------ - ------------
                          
    Since I became president and chief executive officer in 1987, much has
changed in our business. However, one thing has remained constant through these
years--my commitment to you, the trust shareholder. Through the many events at
Van Kampen that have marked the passage of time--including several mergers,
company name changes, and leadership changes--we have always focused on
providing superior investments and the highest level of customer service to help
you meet your investment objectives. I'm proud to say that during my tenure, Van
Kampen won eight consecutive awards for high-quality customer service--more
consecutive service awards than any other firm in the financial services
industry.(1) My successor, Dick Powers, shares this commitment to meeting your
needs and providing innovative and efficient ways to help you work with your
investment adviser to reach your financial goals.
    Although my official retirement begins on January 1, 1999, I will remain
active in the industry and the community. I plan to continue my service as a
member of the board of directors of the Investment Company Institute, the
leading mutual fund industry association, and I will remain a trustee of your
Trust.
    In closing, I want to say farewell to all of you. Thank you for your support
of Van Kampen over the years and for giving me the opportunity to serve you.
 
Best wishes,
 
[SIG]
Don G. Powell
 
                           ------------ - ------------
 
(1)American Capital, which merged with Van Kampen in 1995, received the DALBAR
Service Award annually from 1990 to 1994. The award was called the Quality
Tested Service Seal until 1997.
 
                                        6
<PAGE>   8
 
                               GLOSSARY OF TERMS
 
BASIS POINT: A measure used in quoting bond yields. One hundred basis points is
    equal to 1 percent. For example, if a bond's yield changes from 7.00 to 6.65
    percent, it is a 35 basis-point move.
 
CALL FEATURE: Allows the issuer to buy back a bond on specific dates at set
    prices before maturity. These dates and prices are set when the bond is
    issued. To compensate the bondholder for the potential loss of income and
    ownership, a bond's call price is usually higher than the face value of the
    bond. Bonds are usually called when interest rates drop so significantly
    that the issuer can save money by issuing new bonds at lower rates.
 
COUPON RATE: The stated rate of interest the bond pays on an annual basis,
    expressed as a percentage of the face value.
 
CREDIT RATING: An evaluation of an issuer's credit history and capability of
    repaying obligations. Standard & Poor's and Moody's Investors Service are
    two companies that assign bond ratings. Standard & Poor's ratings range from
    a high of AAA to a low of D, while Moody's ratings range from a high of Aaa
    to a low of C.
 
DISCOUNT BOND: A bond whose market price is lower than its face value (or "par
    value"). Because bonds usually mature at face value, a discount bond has
    more potential to appreciate in price than a par bond does.
 
DURATION: A measure of the sensitivity of a bond's price to changes in interest
    rates, expressed in years. Each year of duration represents an expected 1
    percent change in the price of a bond for every 1 percent change in interest
    rates. The longer a bond's duration, the greater the effect of interest rate
    movements on net asset value. Typically, funds with shorter durations are
    expected to perform better in rising rate environments, while funds with
    longer durations are expected to perform better when rates decline.
 
FEDERAL RESERVE BOARD (THE FED): The governing body of the Federal Reserve
    System, which is the central bank system of the United States. Its
    policy-making committee, called the Federal Open Market Committee, meets
    eight times a year to establish monetary policy and monitor the economic
    pulse of the United States.
 
INFLATION: A persistent and measurable rise in the general level of prices.
    Inflation is widely measured by the Consumer Price Index, an economic
    indicator that measures the change in the cost of purchased goods and
    services.
 
INSURED BOND: A bond that is insured against default by the bond insurer. If the
    issuer defaults, the insurance company will step in and take over payments
    of interest and principal when due. Once a bond is insured, it typically
    carries the rating of the insurer. Most insurers are rated AAA.
 
                                        7
<PAGE>   9
 
MUNICIPAL BOND: A debt security issued by a state, municipality, or other
    government entity to finance capital expenditures of public projects, such
    as the construction of highways, public works, or school buildings. Interest
    on public-purpose municipal bonds is exempt from federal income taxes and,
    potentially, from state and local income taxes.
 
NET ASSET VALUE (NAV): The value of a trust share, calculated by deducting a
    trust's liabilities from the total assets applicable to common shareholders
    in its portfolio and dividing this amount by the number of common shares
    outstanding.
 
PREREFUNDING: The process of issuing new bonds to refinance an outstanding
    municipal bond issue prior to its maturity or call date. The proceeds from
    the new bonds are generally invested in U.S. government securities.
    Prerefunding typically occurs when interest rates decline and an issuer
    replaces its higher-yielding bonds with current lower-yielding issues.
 
PREMIUM BOND: A bond whose market price is above its face value (or "par
    value"). Because bonds usually mature at face value, a premium bond has less
    potential to appreciate in price than a par bond does.
 
YIELD SPREAD: The additional yield investors can earn by either investing in
    bonds with longer maturities or by investing in bonds with lower ratings.
    The spread is the difference in yield between bonds with short versus long
    maturities or the difference in yield between high-quality bonds and
    lower-quality bonds.
 
ZERO COUPON BONDS: A corporate or municipal bond that is traded at a deep
    discount to face value and pays no interest. It may be redeemed at maturity
    for full face value.
 
                                        8
<PAGE>   10
 
           PERFORMANCE RESULTS FOR THE PERIOD ENDED OCTOBER 31, 1998
 
                     VAN KAMPEN TRUST FOR INVESTMENT GRADE
                             CALIFORNIA MUNICIPALS
                           (NYSE TICKER SYMBOL--VIC)

<TABLE>
<CAPTION>
 COMMON SHARE TOTAL RETURNS
 
<S>                                                          <C>
One-year total return based on market price(1).............    15.46%
One-year total return based on NAV(2)......................     9.62%
 
 DISTRIBUTION RATES

Distribution rate as a % of closing common stock
  price(3).................................................     5.50%
Taxable-equivalent distribution rate as a % of closing
  common stock price(4)....................................     9.48%
 
 SHARE VALUATIONS
 
Net asset value............................................  $ 17.51
Closing common stock price.................................  $18.000
One-year high common stock price (10/22/98)................  $18.250
One-year low common stock price (06/23/98).................  $16.500
Preferred share rate(5)....................................     3.05%
</TABLE>
 
(1)Total return based on market price assumes an investment at the market price
at the beginning of the period indicated, reinvestment of all distributions for
the period in accordance with the Trust's dividend reinvestment plan, and sale
of all shares at the closing common stock price at the end of the period
indicated.
 
(2)Total return based on net asset value (NAV) assumes an investment at the
beginning of the period indicated, reinvestment of all distributions for the
period, and sale of all shares at the end of the period, all at NAV.
 
(3)Distribution rate represents the monthly annualized distributions of the
Trust at the end of the period and not the earnings of the Trust.
 
(4)The taxable-equivalent distribution rate is calculated assuming a 42%
combined federal and state income tax bracket, which takes into consideration
the deductibility of individual state taxes paid.
 
(5)See "Notes to Financial Statements" footnote #5, for more information
concerning Preferred Share reset periods.
 
A portion of the interest income may be taxable for those investors subject to
the federal alternative minimum tax (AMT).
 
Past performance does not guarantee future results. Investment return, stock
price and net asset value will fluctuate with market conditions. Trust shares,
when sold, may be worth more or less than their original cost.
 
                                        9
<PAGE>   11
 
                            PORTFOLIO OF INVESTMENTS
 
                                October 31, 1998
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
  Par
Amount
 (000)                      Description                    Coupon     Maturity  Market Value
- --------------------------------------------------------------------------------------------
<S>       <C>                                              <C>        <C>       <C>
          MUNICIPAL BONDS  99.4%
          CALIFORNIA  95.1%
$ 1,000   Bakersfield, CA Ctfs Partn Convention Cent
          Expansion Proj (MBIA Insd).....................    5.875%   04/01/22  $  1,086,700
  1,000   Brea & Olinda, CA Unified Sch Dist Ctfs Partn
          Sr High Sch Pgm Ser A Rfdg (FSA Insd)..........    6.000    08/01/09     1,091,630
  1,000   California Edl Fac Auth Rev College
          Chiropractic Rfdg..............................    5.600    11/01/17     1,038,720
  1,000   California Edl Fac Auth Rev Student Ln CA Ln
          Pgm Ser A (MBIA Insd)..........................    6.000    03/01/16     1,048,990
  1,000   California Edl Fac Auth Rev Univ of La Verne...    6.300    04/01/09     1,074,230
  1,100   California Hlth Fac Fin Auth Rev Hlth Fac Small
          Fac Ln Ser A...................................    6.700    03/01/11     1,193,962
  1,500   California Hlth Fac Fin Auth Rev Hlth Fac Small
          Fac Ln Ser A...................................    6.750    03/01/20     1,631,415
  2,500   California Hlth Fac Fin Auth Rev Insd Hlth Fac
          Valleycare Ser A...............................    6.125    05/01/12     2,650,050
  1,000   California Hlth Fac Fin Auth Rev Kaiser
          Permanente Ser A (FSA Insd)....................    5.550    08/15/25     1,032,760
  1,000   California Hsg Fin Agy Rev Home Mtg Ser B (MBIA
          Insd)..........................................    6.000    08/01/16     1,070,250
  1,000   California Hsg Fin Agy Rev Home Mtg Ser E
          (AMBAC Insd)...................................    6.100    08/01/29     1,072,470
  1,000   California Hsg Fin Agy Rev Home Mtg Ser M (MBIA
          Insd)..........................................    5.550    08/01/17     1,045,060
    990   California Hsg Fin Agy Rev Home Mtg Ser N......    6.375    02/01/27     1,072,675
  1,000   California Hsg Fin Agy Rev Multi-Family Hsg III
          Ser A (MBIA Insd)..............................    5.850    08/01/17     1,055,940
  1,000   California Hsg Fin Agy Rev Multi-Family Hsg III
          Ser A (MBIA Insd)..............................    5.950    08/01/28     1,056,490
 10,000   California Pollutn Ctl Fin Auth Pollutn Ctl Rev
          Southn CA Edison Co (AMBAC Insd)...............    6.000    07/01/27    10,758,000
  2,000   California St (AMBAC Insd).....................    6.200    02/01/16     2,044,080
  1,000   California St Ser BH (FSA Insd)................    5.200    12/01/11     1,020,230
  1,000   California St Ser BH (FSA Insd)................    5.400    12/01/15     1,029,390
  2,000   California St Ser BH (FSA Insd)................    5.400    12/01/16     2,058,780
  1,000   California St Ser BH (FSA Insd)................    5.500    12/01/24     1,029,480
  3,500   California Statewide Cmntys Dev Auth Spl Fac
          United Airls...................................    5.625    10/01/34     3,610,810
  1,000   California Vly Hsg Fin Auth Rev Home Mtg (MBIA
          Insd)..........................................    5.650    02/01/27     1,030,140
  3,000   Central Vly Sch Dist Fin Auth CA Cap Apprec Sch
          Dist Ser A Rfdg (MBIA Insd)....................        *    02/01/10     1,831,260
  1,700   Chula Vista, CA Indl Dev Rev San Diego Gas &
          Elec Co Ser A (AMBAC Insd).....................    6.400    12/01/27     1,867,365
  1,000   Contra Costa Cnty, CA Pub Fin Auth Tax Alloc
          Rev Ser A......................................    7.100    08/01/22     1,096,400
  1,245   Duarte, CA Multi-Family Rev Hsg Heritage Park
          Apts Ser A (FNMA Insd).........................    5.850    05/01/30     1,319,202
  1,000   Emeryville, CA Pub Fin Auth Shellmound Park
          Redev & Hsg Proj B (MBIA Insd).................    5.000    09/01/19     1,002,010
</TABLE>
 
                                               See Notes to Financial Statements
 
                                       10
<PAGE>   12
                      PORTFOLIO OF INVESTMENTS (CONTINUED)
 
                                October 31, 1998
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
  Par
Amount
 (000)                      Description                    Coupon     Maturity  Market Value
- --------------------------------------------------------------------------------------------
<S>       <C>                                              <C>        <C>       <C>
          CALIFORNIA (CONTINUED)
$ 1,000   Folsom, CA Spl Tax Cmnty Fac Dist No. 2 Rfdg
          (Connie Lee Insd)..............................    5.250%   12/01/19  $  1,019,750
  1,000   Fontana, CA Redev Agy Tax Southeast Indl Park
          Proj Rfdg (MBIA Insd)..........................    5.000    09/01/22     1,001,180
  3,000   Foothill/Eastern Corridor Agy CA Toll Rd Rev
          Conv Cap Apprec Sr Lien Ser A (a)..............  0/7.050    01/01/10     2,479,500
  7,455   Foothill/Eastern Corridor Agy CA Toll Rd Rev Sr
          Lien Ser A.....................................        *    01/01/23     2,085,834
  3,000   Foothill/Eastern Corridor Agy CA Toll Rd Rev Sr
          Lien Ser A.....................................        *    01/01/24       792,390
  2,655   Grand Terrace, CA Ctfs Partn Rfdg (MBIA
          Insd)..........................................    5.450    09/01/21     2,791,281
  2,000   Huntington Beach, CA Pub Fin Auth Rev
          Huntington Beach Redev Proj....................    7.000    08/01/10     2,137,460
  1,000   Los Angeles Cnty, CA Tran Comm Sales Tax Rev
          Ser B Rfdg (MBIA Insd).........................    6.500    07/01/13     1,087,950
  2,000   Los Angeles, CA Dept Wtr & Pwr Elec Plt Rev
          Second Issue (Crossover Rfdg @ 09/15/00) (c)...    7.250    09/15/30     2,173,940
  2,500   Los Angeles, CA Multi-Family Rev Hsg Earthquake
          Rehab Proj Ser A (FNMA Insd)...................    5.700    12/01/27     2,680,925
  1,000   Mountain View, CA Cap Impts Fin Auth Rev City
          Hall/Cmnty Theatre (MBIA Insd).................    6.500    08/01/16     1,086,930
  1,930   Orange Cnty, CA Ctfs Partn Juvenile Justice
          Cent Fac Rfdg (AMBAC Insd).....................    6.375    06/01/11     2,117,847
  1,000   Pajaro Vly, CA Unified Sch Dist Ctfs Partn Sch
          Fac Brdg Fdg Pgm (FSA Insd)....................    5.850    09/01/32     1,091,530
    880   Paramount, CA Redev Agy Tax Alloc (MBIA
          Insd)..........................................    6.250    08/01/10       982,617
  1,000   Pomona, CA Pub Fin Auth Rev Southwest Pomona
          Redev Proj Ser W Rfdg (MBIA Insd)..............    5.000    02/01/30       999,140
  2,500   Port Oakland, CA Port Rev Ser E (MBIA Insd)....    6.500    11/01/16     2,753,625
  2,000   Riverside Cnty, CA Brd Edl Ctfs Partn Fin Proj
          Ser A..........................................    6.650    11/01/17     2,144,860
  1,000   Roseville, CA Fin Auth Local Agy Rev Northeast
          Cfd Bond Ser A Rfdg (FSA Insd).................    5.000    09/01/21     1,001,000
  1,000   Roseville, CA Spl Tax Cmnty Fac Dist 1
          Northwest Rfdg (FSA Insd)......................    4.750    09/01/20       971,470
  2,425   San Benito, CA Hosp Dist Hlth Fac Rev Ser A
          (Prerefunded @ 12/01/01).......................    6.750    12/01/21     2,624,578
  1,730   San Bernadino, CA Muni Wtr Dept Ctfs Partn Swr
          (FGIC Insd)....................................    6.250    02/01/17     1,849,041
  1,000   San Bernardino Cnty, CA Ctfs Partn Med Cent Fin
          Proj (MBIA Insd)...............................    5.000    08/01/28       996,080
  5,000   San Diego, CA Indl Dev Rev San Diego Gas & Elec
          Ser A (AMBAC Insd).............................    6.100    09/01/19     5,465,950
  5,000   San Diego, CA Port Fac Rev Natl Steel &
          Shipbldg Co Rfdg...............................    6.600    12/01/02     5,240,400
  1,500   San Francisco, CA City & Cnty Arpt Comm Intl
          Arpt Rev Second Ser Issue 12-A (FGIC Insd).....    5.800    05/01/21     1,593,495
  3,565   San Francisco, CA City & Cnty Redev Agy Hotel
          Tax Rev (Prerefunded @ 07/01/04) (FSA Insd)....    6.750    07/01/15     4,173,189
</TABLE>
 
                                               See Notes to Financial Statements
 
                                       11
<PAGE>   13
                      PORTFOLIO OF INVESTMENTS (CONTINUED)
 
                                October 31, 1998
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
  Par
Amount
 (000)                      Description                    Coupon     Maturity  Market Value
- --------------------------------------------------------------------------------------------
<S>       <C>                                              <C>        <C>       <C>
          CALIFORNIA (CONTINUED)
$ 3,500   San Joaquin Hills, CA Transn Corridor Agy Toll
          Rd Rev Cap Apprec Ser A Rfdg (MBIA Insd).......        *    01/15/29  $    761,110
  1,500   Santa Ana, CA Multi-Family Hsg Rev Villa Del
          Sol Apts Ser B (FNMA Insd).....................    5.650%   11/01/21     1,601,370
  2,250   Santa Barbara, CA Ctfs Partn Harbor Proj
          Rfdg...........................................    6.750    10/01/27     2,458,800
  1,000   Santa Clara Cnty, CA Fin Auth Lease Rev Multi
          Facs Projs Ser B (AMBAC Insd) (b)..............    5.500    05/15/09     1,050,620
  1,000   Santa Clara Cnty, CA Fin Auth Lease Rev VMC Fac
          Replacement Proj Ser A (Prerefunded @ 11/15/04)
          (AMBAC Insd)...................................    6.875    11/15/14     1,185,890
  1,000   Santa Fe Springs, CA Cmnty Dev Commn Tax Alloc
          Cons Redev Proj Ser A Rfdg (MBIA Insd).........    5.000    09/01/17     1,010,360
    735   Southern CA Home Fin Auth Single Family Mtg Rev
          Ser A (GNMA Insd)..............................    6.750    09/01/22       776,006
  1,000   Stockton, CA Hlth Fac Rev Saint Joseph Med Cent
          Ser A (MBIA Insd)..............................    5.625    06/01/13     1,088,740
  3,000   Upland, CA Ctfs Partn Wtr Sys Proj Rfdg (FGIC
          Insd)..........................................    6.600    08/01/16     3,311,370
  2,835   West Covina, CA Ctfs Partn Civic Cent Proj Rfdg
          (FSA Insd).....................................    5.500    09/01/14     3,030,048
  2,000   William S Hart CA Jt Sch Fin Auth Spl Tax Rev
          Cmnty Fac Rfdg (FSA Insd)......................    6.500    09/01/14     2,291,200
                                                                                ------------
                                                                                 119,825,965
                                                                                ------------
          GUAM  4.3%
  1,000   Guam Arpt Auth Rev Ser B.......................    6.700    10/01/23     1,095,160
  4,000   Guam Govt Ltd Oblig Hwy Ser A (FSA Insd) (c)...    6.250    05/01/07     4,384,560
                                                                                ------------
                                                                                   5,479,720
                                                                                ------------
TOTAL INVESTMENTS  99.4%
  (Cost $115,415,000).........................................................   125,305,685
OTHER ASSETS IN EXCESS OF LIABILITIES  0.6%...................................       738,255
                                                                                ------------
NET ASSETS  100.0%............................................................  $126,043,940
                                                                                ============
</TABLE>
 
*Zero coupon bond
 
(a) Security is currently a zero coupon bond which will convert to a coupon
    paying bond at a predetermined date.
 
(b) Securities purchased on a when issued or delayed delivery basis.
 
(c) Assets segregated as collateral for when issued at delayed delivery purchase
    commitments.
 
                                               See Notes to Financial Statements
 
                                       12
<PAGE>   14
 
                      STATEMENT OF ASSETS AND LIABILITIES
 
                                October 31, 1998
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                                                           <C>
ASSETS:
Total Investments (Cost $115,415,000).......................  $125,305,685
Cash........................................................        83,227
Interest Receivable.........................................     1,999,872
Other.......................................................         2,128
                                                              ------------
      Total Assets..........................................   127,390,912
                                                              ------------
LIABILITIES:
Payables:
  Investments Purchased.....................................     1,053,650
  Investment Advisory Fee...................................        69,849
  Administrative Fee........................................        21,492
  Income Distributions--Preferred Shares....................        11,280
  Affiliates................................................         8,990
Accrued Expenses............................................        91,899
Trustees' Deferred Compensation and Retirement Plans........        89,812
                                                              ------------
      Total Liabilities.....................................     1,346,972
                                                              ------------
NET ASSETS..................................................  $126,043,940
                                                              ============
NET ASSETS CONSIST OF:
Preferred Shares ($.01 par value, authorized 100,000,000
  shares, 900 issued with liquidation preference of $50,000
  per share)................................................  $ 45,000,000
                                                              ------------
Common Shares ($.01 par value with an unlimited number of
  shares authorized, 4,629,683 shares issued and
  outstanding)..............................................        46,297
Paid in Surplus.............................................    67,993,767
Net Unrealized Appreciation.................................     9,890,685
Accumulated Net Realized Gain...............................     2,025,820
Accumulated Undistributed Net Investment Income.............     1,087,371
                                                              ------------
      Net Assets Applicable to Common Shares................    81,043,940
                                                              ------------
NET ASSETS..................................................  $126,043,940
                                                              ============
NET ASSET VALUE PER COMMON SHARE ($81,043,940 divided
  by 4,629,683 shares outstanding)..........................  $      17.51
                                                              ============
</TABLE>
 
                                               See Notes to Financial Statements
 
                                       13
<PAGE>   15
 
                            STATEMENT OF OPERATIONS
 
                      For the Year Ended October 31, 1998
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                                                           <C>
INVESTMENT INCOME:
Interest....................................................  $7,086,560
                                                              ----------
EXPENSES:
Investment Advisory Fee.....................................     811,112
Administrative Fee..........................................     249,573
Preferred Share Maintenance.................................     123,461
Trustees' Fees and Expenses.................................      21,194
Legal.......................................................       7,582
Custody.....................................................       4,332
Other.......................................................     149,758
                                                              ----------
    Total Expenses..........................................   1,367,012
                                                              ----------
NET INVESTMENT INCOME.......................................  $5,719,548
                                                              ==========
REALIZED AND UNREALIZED GAIN/LOSS:

Net Realized Gain...........................................  $2,025,977
                                                              ----------
Unrealized Appreciation/Depreciation:
  Beginning of the Period...................................   8,661,224
  End of the Period.........................................   9,890,685
                                                              ----------
Net Unrealized Appreciation During the Period...............   1,229,461
                                                              ----------
NET REALIZED AND UNREALIZED GAIN............................  $3,255,438
                                                              ==========
NET INCREASE IN NET ASSETS FROM OPERATIONS..................  $8,974,986
                                                              ==========
</TABLE>
 
                                               See Notes to Financial Statements
 
                                       14
<PAGE>   16
 
                       STATEMENT OF CHANGES IN NET ASSETS
 
                 For the Years Ended October 31, 1998 and 1997
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                            Year Ended         Year Ended
                                                         October 31, 1998   October 31, 1997
- --------------------------------------------------------------------------------------------
<S>                                                      <C>                <C>
FROM INVESTMENT ACTIVITIES:
Operations:
Net Investment Income...................................   $  5,719,548       $  5,830,126
Net Realized Gain.......................................      2,025,977          1,491,617
Net Unrealized Appreciation During the Period...........      1,229,461          2,374,751
                                                           ------------       ------------
Change in Net Assets from Operations....................      8,974,986          9,696,494
                                                           ------------       ------------
Distributions from Net Investment Income:
  Common Shares.........................................     (4,575,857)        (4,561,267)
  Preferred Shares......................................     (1,295,312)        (1,261,119)
                                                           ------------       ------------
                                                             (5,871,169)        (5,822,386)
                                                           ------------       ------------
Distributions from Net Realized Gain:
  Common Shares.........................................     (1,170,928)          (924,173)
  Preferred Shares......................................       (320,846)          (307,769)
                                                           ------------       ------------
                                                             (1,491,774)        (1,231,942)
                                                           ------------       ------------
Total Distributions.....................................     (7,362,943)        (7,054,328)
                                                           ------------       ------------
NET CHANGE IN NET ASSETS FROM INVESTMENT ACTIVITIES.....      1,612,043          2,642,166
FROM CAPITAL TRANSACTIONS:
Value of Common Shares Issued Through Dividend
  Reinvestment..........................................        180,703                -0-
                                                           ------------       ------------
TOTAL INCREASE IN NET ASSETS............................      1,792,746          2,642,166
NET ASSETS:
Beginning of the Period.................................    124,251,194        121,609,028
                                                           ------------       ------------
End of the Period (Including accumulated undistributed
  net investment income of $1,087,371 and $1,238,992,
  respectively).........................................   $126,043,940       $124,251,194
                                                           ============       ============
</TABLE>
 
                                               See Notes to Financial Statements
 
                                       15
<PAGE>   17
 
                              FINANCIAL HIGHLIGHTS
 
  The following schedule presents financial highlights for one common share of
            the Trust outstanding throughout the periods indicated.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                               March 27, 1992
                                                                                                (Commencement
                                                   Year Ended October 31                        of Investment
                                 ---------------------------------------------------------     Operations) to
                                    1998      1997      1996      1995      1994      1993   October 31, 1992
- -------------------------------------------------------------------------------------------------------------
<S>                              <C>       <C>       <C>       <C>       <C>       <C>       <C>
Net Asset Value,
 Beginning of the Period (a)..   $17.157   $16.584   $16.294   $14.670   $17.644   $14.878            $14.704
                                 -------   -------   -------   -------   -------   -------            -------
 Net Investment Income........     1.236     1.262     1.300     1.296     1.282     1.281               .594
 Net Realized and Unrealized
   Gain/Loss..................      .705      .839      .400     1.648    (3.002)    2.851               .098
                                 -------   -------   -------   -------   -------   -------            -------
Total from Investment
 Operations...................     1.941     2.101     1.700     2.944    (1.720)    4.132               .692
                                 -------   -------   -------   -------   -------   -------            -------
Less:
 Distributions from Net
   Investment Income:
   Paid to Common
     Shareholders.............      .990      .988      .957      .924      .924      .924               .385
   Common Share Equivalent of
     Distributions Paid to
     Preferred
     Shareholders.............      .280      .273      .326      .396      .259      .258               .133
 Distributions from Net
   Realized Gain:
   Paid to Common
     Shareholders.............      .254      .200      .088       -0-      .058      .136               -0-
   Common Share Equivalent of
     Distributions Paid to
     Preferred
     Shareholders.............      .069      .067      .039       -0-      .013      .048                -0-
                                 -------   -------   -------   -------   -------   -------            -------
Total Distributions...........     1.593     1.528     1.410     1.320     1.254     1.366               .518
                                 -------   -------   -------   -------   -------   -------            -------
Net Asset Value, End of the
 Period.......................   $17.505   $17.157   $16.584   $16.294   $14.670   $17.644            $14.878
                                 =======   =======   =======   =======   =======   =======            =======
Market Price Per Share at End
 of the Period................   $18.000   $16.750   $15.750   $14.750   $12.750   $16.375            $14.250
Total Investment Return at
 Market Price (b).............    15.46%    12.96%    14.14%    23.60%   (16.67%)   23.01%           (2.50%)*
Total Return at Net Asset
 Value (c)....................     9.62%     9.78%     8.05%    17.86%   (11.63%)   26.44%             1.70%*
Net Assets at End of the
 Period (In millions).........    $126.0    $124.3    $121.6    $120.3    $112.8    $126.5             $113.7
Ratio of Expenses to Average
 Net Assets Applicable to
 Common Shares**..............     1.71%     1.77%     1.80%     1.83%     1.79%     1.73%               1.70%
Ratio of Net Investment
 Income to Average Net Assets
 Applicable to Common Shares
 (d)..........................     5.54%     5.93%     5.97%     5.83%     6.31%     6.21%               5.18%
Portfolio Turnover............       27%       23%       16%       13%       14%       27%                 51%*

 * Non-Annualized
** Ratio of Expenses to
   Average Net Assets
   Including Preferred
   Shares.....................     1.10%     1.12%     1.13%     1.12%     1.12%     1.09%               1.18%
</TABLE>
 
(a) Net Asset Value at March 27, 1992, is adjusted for common and preferred
    share offering costs of $.296 per common share.
 
(b) Total Investment Return at Market Price reflects the change in market value
    of the common shares for the period indicated with reinvestment of dividends
    in accordance with the Trust's dividend reinvestment plan.
 
(c) Total Return at Net Asset Value (NAV) reflects the change in value of the
    Trust's assets with reinvestment of dividends based upon NAV.
 
(d) Net investment income is adjusted for the common share equivalent of
    distributions paid to preferred shareholders.
                                               See Notes to Financial Statements
 
                                       16
<PAGE>   18
 
                         NOTES TO FINANCIAL STATEMENTS
 
                                October 31, 1998
- --------------------------------------------------------------------------------
 
1. SIGNIFICANT ACCOUNTING POLICIES
 
Van Kampen Trust for Investment Grade California Municipals, formerly known as
Van Kampen American Capital Trust for Investment Grade California Municipals,
(the "Trust") is registered as a diversified closed-end management investment
company under the Investment Company Act of 1940, as amended. The Trust's
investment objective is to provide a high level of current income exempt from
federal and California income taxes, consistent with preservation of capital.
The Trust will invest in a portfolio consisting substantially of California
municipal obligations rated investment grade at the time of investment. The
Trust commenced investment operations on March 27, 1992.
 
    The following is a summary of significant accounting policies consistently
followed by the Trust in the preparation of its financial statements. The
preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts of assets and liabilities and disclosure of
contingent assets and liabilities at the date of the financial statements and
the reported amounts of revenues and expenses during the reporting period.
Actual results could differ from those estimates.
 
A. SECURITY VALUATION--Investments are stated at value using market quotations
or, if such valuations are not available, estimates obtained from yield data
relating to instruments or securities with similar characteristics in accordance
with procedures established in good faith by the Board of Trustees. Short-term
securities with remaining maturities of 60 days or less are valued at amortized
cost.
 
B. SECURITY TRANSACTIONS--Security transactions are recorded on a trade date
basis. Realized gains and losses are determined on an identified cost basis. The
Trust may purchase and sell securities on a "when issued" or "delayed delivery"
basis with settlement to occur at a later date. The value of the security so
purchased is subject to market fluctuations during this period. The Trust will
maintain, in a segregated account with its custodian, assets having an aggregate
value at least equal to the amount of the when issued or delayed delivery
purchase commitments until payment is made.
 
C. INVESTMENT INCOME--Interest income is recorded on an accrual basis. Bond
premium and original issue discount are amortized over the expected life of each
applicable security.
 
                                       17
<PAGE>   19
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
                                October 31, 1998
- --------------------------------------------------------------------------------
 
D. FEDERAL INCOME TAXES--It is the Trust's policy to comply with the
requirements of the Internal Revenue Code applicable to regulated investment
companies and to distribute substantially all of its taxable income to its
shareholders. Therefore, no provision for federal income taxes is required.
 
    At October 31, 1998, for federal income tax purposes cost of long-term
investments is $115,415,000, the aggregate gross unrealized appreciation is
$9,893,715 and the aggregate gross unrealized depreciation is $3,030, resulting
in net unrealized appreciation on long-term investments of $9,890,685.
 
E. DISTRIBUTION OF INCOME AND GAINS--The Trust declares and pays monthly
dividends from net investment income to common shareholders. Net realized gains,
if any, are distributed annually on a pro rata basis to common and preferred
shareholders. Distributions from net realized gains for book purposes may
include short-term capital gains, which are included as ordinary income for tax
purposes.
 
    For the year ended October 31, 1998, 100% of the income distributions made
by the Trust were exempt from federal income taxes. Additionally, during the
period, the Trust declared and paid a 28% rate gain distribution of $856,069 and
a 20% rate gain distribution of $559,828. In January, 1999, the Trust will
provide tax information to shareholders for the 1998 calendar year.
 
2. INVESTMENT ADVISORY AGREEMENT AND OTHER TRANSACTIONS WITH AFFILIATES

Under the terms of the Trust's Investment Advisory Agreement, Van Kampen
Investment Advisory Corp. (the "Adviser") will provide investment advice and
facilities to the Trust for an annual fee payable monthly of .65% of the average
net assets of the Trust. In addition, the Trust will pay a monthly
administrative fee to Van Kampen Funds Inc. or its affiliates (collectively "Van
Kampen"), the Trust's Administrator, at an annual rate of .20% of the average
net assets of the Trust. The administrative services provided by the
Administrator include record keeping and reporting responsibilities with respect
to the Trust's portfolio and preferred shares and providing certain services to
shareholders.
 
    For the year ended October 31, 1998, the Trust recognized expenses of
approximately $3,000 representing legal services provided by Skadden, Arps,
Slate, Meagher & Flom (Illinois), counsel to the Trust, of which a trustee of
the Trust is an affiliated person.
 
                                       18
<PAGE>   20
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
                                October 31, 1998
- --------------------------------------------------------------------------------
 
    For the year ended October 31, 1998, the Trust recognized expenses of
approximately $62,400 representing Van Kampen's cost of providing accounting and
legal services to the Trust.
 
    Certain officers and trustees of the Trust are also officers and directors
of Van Kampen. The Trust does not compensate its officers or trustees who are
officers of Van Kampen.
 
    The Trust provides deferred compensation and retirement plans for its
trustees who are not officers of Van Kampen. Under the deferred compensation
plan, trustees may elect to defer all or a portion of their compensation to a
later date. Benefits under the retirement plan are payable for a ten-year period
and are based upon each trustee's years of service to the Trust. The maximum
annual benefit per trustee under the plan is $2,500.
 
3. CAPITAL TRANSACTIONS
 
At October 31, 1998 and October 31, 1997, paid in surplus related to common
shares aggregated $67,993,767 and $67,813,169, respectively.
    Transactions in common shares were as follows:
 
<TABLE>
<CAPTION>
                                           YEAR ENDED          YEAR ENDED
                                        OCTOBER 31, 1998    OCTOBER 31, 1997
- ----------------------------------------------------------------------------
<S>                                     <C>                 <C>
Beginning Shares.......................        4,619,242           4,619,242
Shares Issued Through Dividend
  Reinvestment.........................           10,441                 -0-
                                               ---------           ---------
Ending Shares..........................        4,629,683           4,619,242
                                               =========           =========
</TABLE>
 
4. INVESTMENT TRANSACTIONS
 
During the period, the cost of purchases and proceeds from sales of investments,
excluding short-term investments, were $33,949,845 and $33,988,468,
respectively.
 
5. PREFERRED SHARES
 
The Trust has outstanding 900 Auction Preferred Shares ("APS"). Dividends are
cumulative and the dividend rate is currently reset every 28 days through an
auction process. The rate in effect on October 31, 1998 was 3.05%. During the
year ended October 31, 1998, the rates ranged from 2.800% to 5.500%.
 
    The Trust pays annual fees equivalent to .25% of the preferred share
liquidation value for the remarketing efforts associated with the preferred
auctions. These fees are included as a component of Preferred Share Maintenance
expense.
 
    The APS are redeemable at the option of the Trust in whole or in part at the
liquidation value of $50,000 per share plus accumulated and unpaid dividends.
The Trust
 
                                       19
<PAGE>   21
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
                                October 31, 1998
- --------------------------------------------------------------------------------
 
is subject to certain asset coverage tests and the APS are subject to mandatory
redemption if the tests are not met.
 
6. CAPITAL GAIN DISTRIBUTION
 
On December 3, 1998 the Trust declared a capital gain of $.4212 per common
share, of which $.3080 is long-term and $.0307 is short-term, to common
shareholders of record on December 15, 1998. The gain will be payable on
December 31, 1998.
 
7. YEAR 2000 COMPLIANCE (UNAUDITED)
 
Van Kampen utilizes a number of computer programs across its entire operation
relying on both internal software systems as well as external software systems
provided by third parties. In 1996 Van Kampen initiated a CountDown 2000 Project
to review both the internal systems and external vendor connections. The goal of
this project is to position its business to continue unaffected as a result of
the century change. At this time, there can be no assurance that the steps taken
will be sufficient to avoid any adverse impact to the Trust, but Van Kampen does
not anticipate that the move to Year 2000 will have a material impact on its
ability to continue to provide the Trust with service at current levels. In
addition, it is possible that the securities markets in which the Trust invests
may be detrimentally affected by computer failures throughout the financial
services industry beginning January 1, 2000. Improperly functioning trading
systems may result in settlement problems and liquidity issues.
 
                                       20
<PAGE>   22
 
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
The Board of Trustees and Shareholders of
Van Kampen Trust for Investment Grade California Municipals:
 
We have audited the accompanying statement of assets and liabilities of Van
Kampen Trust for Investment Grade California Municipals (the "Trust"), including
the portfolio of investments, as of October 31, 1998, and the related statement
of operations for the year then ended, the statement of changes in net assets
for each of the two years in the period then ended, and the financial highlights
for each of the periods presented. These financial statements and financial
highlights are the responsibility of the Trust's management. Our responsibility
is to express an opinion on these financial statements and financial highlights
based on our audits.
 
    We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
October 31, 1998, by correspondence with the custodian and broker. An audit also
includes assessing the accounting principles used and significant estimates made
by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.
 
    In our opinion, the financial statements and financial highlights referred
to above present fairly, in all material respects, the financial position of Van
Kampen Trust for Investment Grade California Municipals as of October 31, 1998,
the results of its operations for the year then ended, the changes in its net
assets for each of the two years in the period then ended, and the financial
highlights for each of the periods presented, in conformity with generally
accepted accounting principles.
 
                                                           KPMG Peat Marwick LLP
 
Chicago, Illinois
December 3, 1998
 
                                       21
<PAGE>   23
 
                           DIVIDEND REINVESTMENT PLAN
 
The Trust offers a dividend reinvestment plan (the "Plan") pursuant to which
Common Shareholders may elect to have dividends and capital gains distributions
reinvested in Common Shares of the Trust. The Trust declares dividends out of
net investment income, and will distribute annually net realized capital gains,
if any. Common Shareholders may join or withdraw from the Plan at any time.
 
    If you decide to participate in the Plan, State Street Bank and Trust
Company, as your Plan Agent, will automatically invest your dividends and
capital gains distributions in Common Shares of the Trust for your account.
 
HOW TO PARTICIPATE
 
If you wish to participate and your shares are held in your own name, call
1-800-341-2929 for more information and a Plan brochure. If your shares are held
in the name of a brokerage firm, bank, or other nominee, you should contact your
nominee to see if it would participate in the Plan on your behalf. If you wish
to participate in the Plan, but your brokerage firm, bank or nominee is unable
to participate on your behalf, you should request that your shares be re-
registered in your own name which will enable your participation in the Plan.
 
HOW THE PLAN WORKS
 
Participants in the Plan will receive the equivalent in Common Shares valued on
the valuation date, generally at the lower of market price or net asset value,
except as specified below. The valuation date will be the dividend or
distribution payment date or, if that date is not a trading day on the national
securities exchange or market system on which the Common Shares are listed for
trading, the next preceding trading day. If the market price per Common Share on
the valuation date equals or exceeds net asset value per Common Share on that
date, the Trust will issue new Common Shares to participants valued at the
higher of net asset value or 95% of the market price on the valuation date. In
the foregoing situation, the Trust will not issue Common Shares under the Plan
below net asset value. If net asset value per Common Share on the valuation date
exceeds the market price per Common Share on that date, or if the Board of
Trustees should declare a dividend or capital gains distribution payable to the
Common Shareholders only in cash, participants in the Plan will be deemed to
have elected to receive Common Shares from the Trust valued at the market price
on that date. Accordingly, in this circumstance, the Plan Agent will, as agent
for the participants, buy the Trust's Common Shares in the open market for the
participants' accounts on or shortly after the payment date. If, before the Plan
Agent has completed its purchases, the market price exceeds the net asset value
per share of the Common Shares, the average per share purchase price paid by the
Plan Agent may exceed the net asset value of the Trust's Common Shares,
resulting in the acquisition of fewer Common Shares than if the dividend or
distribution had been paid in Common Shares issued by the Trust. All
reinvestments are in full and fractional Common Shares and are carried to three
decimal places.
 
    Experience under the Plan may indicate that changes are desirable.
Accordingly, the Trust reserves the right to amend or terminate the Plan as
applied to any dividend or distribution paid subsequent to written notice of the
changes sent to all Common Shareholders of the Trust at least 90 days before the
record date for the dividend or distribution. The Plan also may be amended or
terminated by the Plan Agent by at least 90 days written notice to all Common
Shareholders of the Trust.
 
COSTS OF THE PLAN
 
The Plan Agent's fees for the handling of the reinvestment of dividends and
distributions will be paid by the Trust. However, each participant will pay a
pro rata share of brokerage commissions incurred with respect to the Plan
Agent's open market purchases in connection with the reinvestment of dividends
and distributions. No other charges will be made to participants for reinvesting
dividends or capital gains distributions, except for certain brokerage
commissions, as described above.
 
TAX IMPLICATIONS
 
You will receive tax information annually for your personal records and to help
you prepare your federal income tax return. The automatic reinvestment of
dividends and capital gains distributions does not relieve you of any income tax
which may be payable on dividends or distributions.
 
RIGHT TO WITHDRAW
 
Plan participants may withdraw at any time by calling 1-800-341-2929 or by
writing State Street Bank and Trust Company, P.O. Box 8200, Boston, MA
02266-8200. If you withdraw, you will receive, without charge, a share
certificate issued in your name for all full Common Shares credited to your
account under the Plan and a cash payment will be made for any fractional Common
Share credited to your account under the Plan. You may again elect to
participate in the Plan at any time by calling 1-800-341-2929 or writing to the
Trust at:
                             Van Kampen Funds Inc.
                             Attn: Closed-End Funds
                              2800 Post Oak Blvd.
                               Houston, TX 77056
 
                                       22
<PAGE>   24
 
                                VAN KAMPEN FUNDS
 
EQUITY FUNDS
 
Domestic
     Aggressive Equity
     Aggressive Growth
     American Value
     Comstock
     Emerging Growth
     Enterprise
     Equity Growth
     Equity Income
     Growth
     Growth and Income
     Harbor
     Pace
     Real Estate Securities
     U.S. Real Estate
     Utility
     Value

International/Global
     Asian Growth
     Emerging Markets
     European Equity
     Global Equity
     Global Equity Allocation
     Global Franchise
     Global Managed Assets
     International Magnum
     Latin American
 
FIXED-INCOME FUNDS
Income
     Corporate Bond
     Global Fixed Income
     Global Government Securities
     Government Securities
     High Income Corporate Bond
     High Yield
     High Yield & Total Return
     Limited Maturity Government
     Short-Term Global Income
     Strategic Income
     U.S. Government
     U.S. Government Trust for Income
     Worldwide High Income

Tax Exempt Income
     California Insured Tax Free
     Florida Insured Tax Free Income
     High Yield Municipal
     Insured Tax Free Income
     Intermediate Term Municipal Income
     Municipal Income
     New York Tax Free Income
     Pennsylvania Tax Free Income
     Tax Free High Income

Capital Preservation
     Reserve
     Tax Free Money

Senior Loan
     Prime Rate Income Trust
     Senior Floating Rate
 
To find out more about any of these funds, ask your financial adviser for a
prospectus, which contains more complete information, including sales charges,
risks, and expenses. Please read it carefully before you invest or send money.
 
To view a current Van Kampen fund prospectus or to receive additional fund
information, choose from one of the following:
 
- - visit our web site at
  WWW.VANKAMPEN.COM -- to view a prospectus, select Download Prospectus
 
- - call us at 1-800-341-2911 weekdays from 7:00 a.m. to 7:00 p.m. Central time
  (Telecommunications Device for the Deaf users, call 1-800-421-2833)
 
- - e-mail us by visiting
  WWW.VANKAMPEN.COM and selecting Contact Us
 
                                       23
<PAGE>   25
 
          VAN KAMPEN TRUST FOR INVESTMENT GRADE CALIFORNIA MUNICIPALS
 
BOARD OF TRUSTEES
 
DAVID C. ARCH

ROD DAMMEYER

HOWARD J KERR

DENNIS J. MCDONNELL*--Chairman

STEVEN MULLER

THEODORE A. MYERS

DON G. POWELL*

HUGO F. SONNENSCHEIN

WAYNE W. WHALEN*
 
OFFICERS
 
DENNIS J. MCDONNELL*
  President
 
RONALD A. NYBERG*
  Vice President and Secretary
 
JOHN L. SULLIVAN*
  Vice President, Treasurer
  and Chief Financial Officer
 
CURTIS W. MORELL*
  Vice President and Chief Accounting Officer
 
TANYA M. LODEN*
  Controller
 
PETER W. HEGEL*
EDWARD C. WOOD, III*
  Vice Presidents

INVESTMENT ADVISER
 
VAN KAMPEN
INVESTMENT ADVISORY CORP.
1 Parkview Plaza
P.O. Box 5555
Oakbrook Terrace, Illinois 60181-5555
 
CUSTODIAN AND TRANSFER AGENT
 
STATE STREET BANK
AND TRUST COMPANY
225 Franklin Street
P.O. Box 1713
Boston, Massachusetts 02105
 
LEGAL COUNSEL
 
SKADDEN, ARPS, SLATE,
MEAGHER & FLOM (ILLINOIS)
333 West Wacker Drive
Chicago, Illinois 60606
 
INDEPENDENT ACCOUNTANTS
 
KPMG PEAT MARWICK LLP
Peat Marwick Plaza
303 East Wacker Drive
Chicago, Illinois 60601
 
* "Interested" persons of the Trust, as defined in the Investment Company Act of
  1940.
 
(C) Van Kampen Funds Inc., 1998 All rights reserved.
 
(SM) denotes a service mark of Van Kampen Funds Inc.
 
                                       24
<PAGE>   26
 
                          RESULTS OF SHAREHOLDER VOTES
 
     The Annual Meeting of Shareholders of the Trust was held on July 28, 1998
where shareholders voted on the election of trustees and the selection of
independent public accountants.
 
1) With regard to the election of the following trustees by the preferred
shareholders of the Trust:
 
<TABLE>
<CAPTION>
                                                        # OF SHARES
                                                   ---------------------
                                                   IN FAVOR     WITHHELD
- ------------------------------------------------------------------------
<S>                                                <C>          <C>
Theodore A. Myers.................................       828          0
</TABLE>
 
2) With regard to the election of the following trustees by the common
shareholders of the Trust:
 
<TABLE>
<CAPTION>
                                                        # OF SHARES
                                                   ---------------------
                                                   IN FAVOR     WITHHELD
- ------------------------------------------------------------------------
<S>                                                <C>          <C>
Don G. Powell..................................... 4,100,603     33,880
Hugo F. Sonnenschein.............................. 4,098,300     36,183
</TABLE>
 
The other trustees of the Trust whose terms did not expire in 1998 are David C.
Arch, Rod Dammeyer, Howard J Kerr, Dennis J. McDonnell, Steven Muller and Wayne
W. Whalen.
 
3) With regard to the ratification of KPMG Peat Marwick LLP as independent
public accountants for the Trust, 4,060,412 shares voted for the proposal, 6,036
shares voted against, and 68,862 shares abstained.
 
                                       25

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 11
   <NAME> TRUST FOR INVESTMENT GRADE CA MUNI
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          OCT-31-1998
<PERIOD-START>                             NOV-01-1997
<PERIOD-END>                               OCT-31-1998
<INVESTMENTS-AT-COST>                      115,415,000
<INVESTMENTS-AT-VALUE>                     125,305,685            
<RECEIVABLES>                                1,999,872
<ASSETS-OTHER>                                   2,128
<OTHER-ITEMS-ASSETS>                            83,227
<TOTAL-ASSETS>                             127,390,912
<PAYABLE-FOR-SECURITIES>                     1,053,650
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      293,322
<TOTAL-LIABILITIES>                          1,346,972
<SENIOR-EQUITY>                             45,000,000
<PAID-IN-CAPITAL-COMMON>                    68,040,064
<SHARES-COMMON-STOCK>                        4,629,683
<SHARES-COMMON-PRIOR>                        4,619,242
<ACCUMULATED-NII-CURRENT>                    1,087,371
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      2,025,820
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     9,890,685
<NET-ASSETS>                               126,043,940
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            7,086,560
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (1,367,012)
<NET-INVESTMENT-INCOME>                      5,719,548
<REALIZED-GAINS-CURRENT>                     2,025,977
<APPREC-INCREASE-CURRENT>                    1,229,461
<NET-CHANGE-FROM-OPS>                        8,974,986
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (5,871,169)
<DISTRIBUTIONS-OF-GAINS>                   (1,491,774)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                             10,441
<NET-CHANGE-IN-ASSETS>                       1,792,746
<ACCUMULATED-NII-PRIOR>                      1,238,992
<ACCUMULATED-GAINS-PRIOR>                    1,491,617
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          811,112
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,367,012
<AVERAGE-NET-ASSETS>                        79,807,874
<PER-SHARE-NAV-BEGIN>                           17.157
<PER-SHARE-NII>                                  1.236
<PER-SHARE-GAIN-APPREC>                          0.705
<PER-SHARE-DIVIDEND>                           (1.270)
<PER-SHARE-DISTRIBUTIONS>                      (0.323)
<RETURNS-OF-CAPITAL>                             0.000
<PER-SHARE-NAV-END>                             17.505
<EXPENSE-RATIO>                                   1.71
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>


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