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<PAGE> PAGE 2
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<PAGE> PAGE 3
008 D020002 CA
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<PAGE> PAGE 4
020 C000007 5
020 A000008 LEHMAN BROTHERS INC.
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022 B000005 13-3810923
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022 D000006 6824
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022 C000007 2951
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022 C000009 4365
022 D000009 9343
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<PAGE> PAGE 5
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 10
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SIGNATURE BARRY FINK
TITLE VICE PRESIDENT
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Small Cap Growth Fund - Class A
</LEGEND>
<CIK> 0000889128
<NAME> MORGAN STANLEY DEAN WITTER SMALL CAP GROWTH FUND - CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-END> AUG-31-1999
<INVESTMENTS-AT-COST> 204,791,737
<INVESTMENTS-AT-VALUE> 389,452,314
<RECEIVABLES> 4,605,267
<ASSETS-OTHER> 157,649
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 394,215,230
<PAYABLE-FOR-SECURITIES> (1,934,845)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (1,330,380)
<TOTAL-LIABILITIES> (3,265,225)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 173,023,609
<SHARES-COMMON-STOCK> 245,655
<SHARES-COMMON-PRIOR> 105,934
<ACCUMULATED-NII-CURRENT> (3,630,117)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 36,895,936
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 184,660,577
<NET-ASSETS> 6,832,661
<DIVIDEND-INCOME> 708
<INTEREST-INCOME> 125,864
<OTHER-INCOME> 0
<EXPENSES-NET> (3,756,689)
<NET-INVESTMENT-INCOME> (3,630,117)
<REALIZED-GAINS-CURRENT> 37,629,540
<APPREC-INCREASE-CURRENT> 40,316,742
<NET-CHANGE-FROM-OPS> 74,316,165
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (123,422)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 283,895
<NUMBER-OF-SHARES-REDEEMED> (147,260)
<SHARES-REINVESTED> 3,086
<NET-CHANGE-IN-ASSETS> 63,336,371
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 9,261,889
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (1,829,944)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (3,756,689)
<AVERAGE-NET-ASSETS> 4,322,672
<PER-SHARE-NAV-BEGIN> 23.13
<PER-SHARE-NII> (0.19)
<PER-SHARE-GAIN-APPREC> 7.77
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.90)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 27.81
<EXPENSE-RATIO> 1.48
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Small Cap Growth Fund - Class B
</LEGEND>
<CIK> 0000889128
<NAME> MORGAN STANLEY DEAN WITTER SMALL CAP GROWTH FUND - CLASS B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-END> AUG-31-1999
<INVESTMENTS-AT-COST> 204,791,737
<INVESTMENTS-AT-VALUE> 389,452,314
<RECEIVABLES> 4,605,267
<ASSETS-OTHER> 157,649
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 394,215,230
<PAYABLE-FOR-SECURITIES> (1,934,845)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (1,330,380)
<TOTAL-LIABILITIES> (3,265,225)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 173,023,609
<SHARES-COMMON-STOCK> 13,784,725
<SHARES-COMMON-PRIOR> 14,118,639
<ACCUMULATED-NII-CURRENT> (3,630,117)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 36,895,936
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 184,660,577
<NET-ASSETS> 377,432,684
<DIVIDEND-INCOME> 708
<INTEREST-INCOME> 125,864
<OTHER-INCOME> 0
<EXPENSES-NET> (3,756,689)
<NET-INVESTMENT-INCOME> (3,630,117)
<REALIZED-GAINS-CURRENT> 37,629,540
<APPREC-INCREASE-CURRENT> 40,316,742
<NET-CHANGE-FROM-OPS> 74,316,165
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (9,774,246)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,333,164
<NUMBER-OF-SHARES-REDEEMED> (2,019,629)
<SHARES-REINVESTED> 352,551
<NET-CHANGE-IN-ASSETS> 63,336,371
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 9,261,889
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (1,829,944)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (3,756,689)
<AVERAGE-NET-ASSETS> 355,864,846
<PER-SHARE-NAV-BEGIN> 22.84
<PER-SHARE-NII> (0.26)
<PER-SHARE-GAIN-APPREC> 7.70
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.90)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 27.38
<EXPENSE-RATIO> 2.05
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Small Cap Growth Fund - Class C
</LEGEND>
<CIK> 0000889128
<NAME> MORGAN STANLEY DEAN WITTER SMALL CAP GROWTH FUND - CLASS C
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-END> AUG-31-1999
<INVESTMENTS-AT-COST> 204,791,737
<INVESTMENTS-AT-VALUE> 389,452,314
<RECEIVABLES> 4,605,267
<ASSETS-OTHER> 157,649
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 394,215,230
<PAYABLE-FOR-SECURITIES> (1,934,845)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (1,330,380)
<TOTAL-LIABILITIES> (3,265,225)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 173,023,609
<SHARES-COMMON-STOCK> 169,676
<SHARES-COMMON-PRIOR> 116,532
<ACCUMULATED-NII-CURRENT> (3,630,117)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 36,895,936
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 184,660,577
<NET-ASSETS> 4,642,475
<DIVIDEND-INCOME> 708
<INTEREST-INCOME> 125,864
<OTHER-INCOME> 0
<EXPENSES-NET> (3,756,689)
<NET-INVESTMENT-INCOME> (3,630,117)
<REALIZED-GAINS-CURRENT> 37,629,540
<APPREC-INCREASE-CURRENT> 40,316,742
<NET-CHANGE-FROM-OPS> 74,316,165
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (97,423)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 85,891
<NUMBER-OF-SHARES-REDEEMED> (36,334)
<SHARES-REINVESTED> 3,587
<NET-CHANGE-IN-ASSETS> 63,336,371
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 9,261,889
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (1,829,944)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (3,756,689)
<AVERAGE-NET-ASSETS> 3,460,973
<PER-SHARE-NAV-BEGIN> 22.85
<PER-SHARE-NII> (0.28)
<PER-SHARE-GAIN-APPREC> 7.69
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.90)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 27.36
<EXPENSE-RATIO> 2.23
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Small Cap Growth Fund - Class D
</LEGEND>
<CIK> 0000889128
<NAME> MORGAN STANLEY DEAN WITTER SMALL CAP GROWTH FUND - CLASS D
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-END> AUG-31-1999
<INVESTMENTS-AT-COST> 204,791,737
<INVESTMENTS-AT-VALUE> 389,452,314
<RECEIVABLES> 4,605,267
<ASSETS-OTHER> 157,649
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 394,215,230
<PAYABLE-FOR-SECURITIES> (1,934,845)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (1,330,380)
<TOTAL-LIABILITIES> (3,265,225)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 173,023,609
<SHARES-COMMON-STOCK> 73,080
<SHARES-COMMON-PRIOR> 553
<ACCUMULATED-NII-CURRENT> (3,630,117)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 36,895,936
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 184,660,577
<NET-ASSETS> 2,042,185
<DIVIDEND-INCOME> 708
<INTEREST-INCOME> 125,864
<OTHER-INCOME> 0
<EXPENSES-NET> (3,756,689)
<NET-INVESTMENT-INCOME> (3,630,117)
<REALIZED-GAINS-CURRENT> 37,629,540
<APPREC-INCREASE-CURRENT> 40,316,742
<NET-CHANGE-FROM-OPS> 74,316,165
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (402)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 76,034
<NUMBER-OF-SHARES-REDEEMED> (3,522)
<SHARES-REINVESTED> 15
<NET-CHANGE-IN-ASSETS> 63,336,371
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 9,261,889
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (1,829,944)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (3,756,689)
<AVERAGE-NET-ASSETS> 351,235
<PER-SHARE-NAV-BEGIN> 23.20
<PER-SHARE-NII> (0.36)
<PER-SHARE-GAIN-APPREC> 8.00
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.90)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 27.94
<EXPENSE-RATIO> 1.23
</TABLE>
<TABLE>
<CAPTION>
EXHIBIT 77(O) MORGAN STANLEY DEAN WITTER SMALL CAP GROWTH FUND
10f-3 transactions for the period March 1, 1999 - August 31, 1999
<S> <C> <C> <C> <C> <C> <C> <C>
TOTAL
ISSUED/
DATE PRICE SHARES % of PRINCIPAL PURCHASED
SECURITY PURCHASED SHARE PURCHASED Assets AMOUNT BY FUND BROKER(S)
Ariba Inc. 6/22/99 $23.00 1,000 0.300% $115,000,000 0.020% Dain Rauscher
Dycom Industries Inc. 5/13/99 $48.50 34,900 0.4537% $1,692.650 1.000% Nationsbanc
Montgomeries Securities
Laser Vision Centers Inc. 5/10/99 $46.50 16,500 0.2191% $79,980,000 1.000% A.G. Edwards & Sons
Launch Media, Inc. 4/23/99 $22.00 4,200 0.0250% $77,000,000 0.120% Hambrecht & Quist
Media Matrix Inc. 5/7/99 $17.00 2,300 0.0112% $51,000,000 0.0766% Donaldson Lufkin
MPath Interactive, Inc. 4/29/99 $18.00 6,700 0.0347% $70,200,000 0.170% Thomas Weisel
BancBoston Robertson
Stephens
One Source Information Services
Inc. 5/19/99 $12.00 900 0.0029% $43,632,000 0.0247% William Blair & Co.
Persistence Software Inc. 6/25/99 $11.00 13,000 0.0900% $33,000,000 0.433% BancBoston Robertson
Stephens
Rubio Restaurants Inc. 5/21/99 $10.50 2,500 0.0072% $33,075,000 0.0793% Dain Rauscher Wessels
Scient Corp. 5/1/99 $20.00 1,000 0.0053% $60,000,000 0.0333% Thomas Weisel Partners
Star Media Network, Inc. 5/25/99 $15.00 7,700 0.0329% $105,00,000 0.110% Goldman Sachs
Aironet Wireless Communications 7/29/99 $11.00 50,000 0.060% $66,000,000 0.833% Dain Rauscher
Creo Products Inc. 7/29/99 $15.00 15,400 0.059% $75,000,000 0.308% Salomon Smith Barney
Focal Communication Group 7/27/99 $13.00 19,800 0.340% $129,350,000 0.198% Salomon Smith Barney
Homestore.com 8/4/99 $20.00 1,000 0.390% $140,000,000 0.0142% BancBoston Robertson
Stephens
Insight Communications Co. Inc. 7/21/99 $24.50 13,200 0.080% $563,500,000 0.057% Donaldson Lufkin
Net2Phone Inc. 7/29/99 $15.00 2,200 0.0084% $81,000,000 0.0407% Hambrecht & Quist
Salem Communications 7/1/99 $22.50 6,300 0.035% $189,000,000 0.075% Deutsche Bank
Alex Brown
</TABLE>
Morgan Stanley Dean Witter Small Cap Growth Fund
(formerly named TCW/DW Small Cap Growth Fund)
Item 77.C. Matters Submitted to a Vote of Security Holders -
June 8, 1999
Approval of a new investment advisory agreement between
Morgan Stanley Dean Witter Small Cap Growth Fund and Morgan
Stanley Dean Witter Advisors Inc.
For: 6,375,371 Against: 155,976 Abstain: 694,507
Approval of a new sub-advisory agreement between Morgan
Stanley Dean Witter Advisors Inc. and TCW Funds Management, Inc.
For:6,344,040 Against: 167,433 Abstain:
714,381
Upon effectiveness of the Proposals, TCW/DW Small Cap Growth Fund
changed its name to Morgan Stanley Dean Witter Small Cap Growth
Fund.