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<PAGE> PAGE 2
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<PAGE> PAGE 3
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<PAGE> PAGE 4
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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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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>
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-END> FEB-29-2000
<INVESTMENTS-AT-COST> 477,127,746
<INVESTMENTS-AT-VALUE> 1,207,907,846
<RECEIVABLES> 16,545,313
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<PAYABLE-FOR-SECURITIES> (65,390,694)
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<OTHER-ITEMS-LIABILITIES> (2,047,833)
<TOTAL-LIABILITIES> (67,438,527)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 390,753,791
<SHARES-COMMON-STOCK> 587,278
<SHARES-COMMON-PRIOR> 105,934
<ACCUMULATED-NII-CURRENT> 0
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<ACCUMULATED-NET-GAINS> 35,513,108
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<NET-ASSETS> 36,835,091
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,379,205
<OTHER-INCOME> 0
<EXPENSES-NET> (9,486,253)
<NET-INVESTMENT-INCOME> (8,107,048)
<REALIZED-GAINS-CURRENT> 78,386,411
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<DISTRIBUTIONS-OF-GAINS> (886,302)
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<NUMBER-OF-SHARES-REDEEMED> (301,186)
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<OVERDIST-NET-GAINS-PRIOR> 0
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<GROSS-EXPENSE> (9,486,253)
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<PER-SHARE-NII> (0.41)
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<PER-SHARE-DISTRIBUTIONS> (2.93)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 62.72
<EXPENSE-RATIO> 1.40
</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>
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-END> FEB-29-2000
<INVESTMENTS-AT-COST> 477,127,746
<INVESTMENTS-AT-VALUE> 1,207,907,846
<RECEIVABLES> 16,545,313
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<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,224,485,526
<PAYABLE-FOR-SECURITIES> (65,390,694)
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<OTHER-ITEMS-LIABILITIES> (2,047,833)
<TOTAL-LIABILITIES> (67,438,527)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 390,753,791
<SHARES-COMMON-STOCK> 17,378,056
<SHARES-COMMON-PRIOR> 14,118,639
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 35,513,108
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 730,780,100
<NET-ASSETS> 1,069,966,881
<DIVIDEND-INCOME> 0
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<OTHER-INCOME> 0
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<NET-INVESTMENT-INCOME> (8,107,048)
<REALIZED-GAINS-CURRENT> 78,386,411
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<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (42,219,798)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,818,323
<NUMBER-OF-SHARES-REDEEMED> (4,560,472)
<SHARES-REINVESTED> 1,001,566
<NET-CHANGE-IN-ASSETS> 829,433,365
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 9,261,889
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (4,470,746)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (9,486,253)
<AVERAGE-NET-ASSETS> 493,275,553
<PER-SHARE-NAV-BEGIN> 22.84
<PER-SHARE-NII> (0.55)
<PER-SHARE-GAIN-APPREC> 42.21
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.93)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 61.57
<EXPENSE-RATIO> 1.85
</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>
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-END> FEB-29-2000
<INVESTMENTS-AT-COST> 477,127,746
<INVESTMENTS-AT-VALUE> 1,207,907,846
<RECEIVABLES> 16,545,313
<ASSETS-OTHER> 32,367
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,224,485,526
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<OTHER-ITEMS-LIABILITIES> (2,047,833)
<TOTAL-LIABILITIES> (67,437,527)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 390,753,791
<SHARES-COMMON-STOCK> 466,999
<SHARES-COMMON-PRIOR> 116,532
<ACCUMULATED-NII-CURRENT> 0
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<ACCUMULATED-NET-GAINS> 35,513,108
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 730,780,100
<NET-ASSETS> 28,674,648
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,379,205
<OTHER-INCOME> 0
<EXPENSES-NET> (9,486,253)
<NET-INVESTMENT-INCOME> (8,107,048)
<REALIZED-GAINS-CURRENT> 78,386,411
<APPREC-INCREASE-CURRENT> 586,436,265
<NET-CHANGE-FROM-OPS> 656,715,628
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (700,263)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 448,998
<NUMBER-OF-SHARES-REDEEMED> (113,941)
<SHARES-REINVESTED> 15,410
<NET-CHANGE-IN-ASSETS> 829,433,365
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 9,261,889
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (4,470,746)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (9,486,253)
<AVERAGE-NET-ASSETS> 7,957,634
<PER-SHARE-NAV-BEGIN> 22.85
<PER-SHARE-NII> (0.70)
<PER-SHARE-GAIN-APPREC> 42.18
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.93)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 61.40
<EXPENSE-RATIO> 2.18
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER SMALL CAP GROWTH FUND - CLASS D
</LEGEND>
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-END> FEB-29-2000
<INVESTMENTS-AT-COST> 477,127,746
<INVESTMENTS-AT-VALUE> 1,207,907,846
<RECEIVABLES> 16,545,313
<ASSETS-OTHER> 32,367
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,224,485,526
<PAYABLE-FOR-SECURITIES> (65,390,694)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (2,047,833)
<TOTAL-LIABILITIES> (67,438,527)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 390,753,791
<SHARES-COMMON-STOCK> 341,788
<SHARES-COMMON-PRIOR> 553
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 35,513,108
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 730,780,100
<NET-ASSETS> 21,570,379
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,379,205
<OTHER-INCOME> 0
<EXPENSES-NET> (9,486,253)
<NET-INVESTMENT-INCOME> (8,107,048)
<REALIZED-GAINS-CURRENT> 78,386,411
<APPREC-INCREASE-CURRENT> 586,436,265
<NET-CHANGE-FROM-OPS> 656,715,628
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (241,781)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 839,942
<NUMBER-OF-SHARES-REDEEMED> (503,074)
<SHARES-REINVESTED> 4,367
<NET-CHANGE-IN-ASSETS> 829,433,365
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 144,343,835
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (4,470,746)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (9,486,253)
<AVERAGE-NET-ASSETS> 3,311,395
<PER-SHARE-NAV-BEGIN> 23.20
<PER-SHARE-NII> (0.35)
<PER-SHARE-GAIN-APPREC> 43.19
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.93)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 63.11
<EXPENSE-RATIO> 1.18
</TABLE>
Report of Independent Accountants
To the Shareholders and Trustees of
Morgan Stanley Dean Witter Small Cap Growth Fund
In planning and performing our audit of the financial
statements of Morgan Stanley Dean Witter Small Cap Growth
Fund (the "Fund"), formerly TCW/DW Small Cap Growth Fund,
for the year ended February 29, 2000, we considered its
internal control, including control activities for
safeguarding securities, in order to determine our auditing
procedures for the purpose of expressing our opinion on the
financial statements and to comply with the requirements of
Form N-SAR, not to provide assurance on internal control.
The management of the Fund is responsible for establishing
and maintaining internal control. In fulfilling this
responsibility, estimates and judgements by management are
required to assess the expected benefits and related costs
of controls. Generally, controls that are relevant to an
audit pertain to the entity's objective of preparing
financial statements for external purposes that are fairly
presented in conformity with generally accepted accounting
principles. Those controls include the safeguarding of
assets against unauthorized acquisition, use or disposition.
Because of inherent limitations in internal control, errors
or fraud may occur and not be detected. Also, projection of
any evaluation of internal control to future periods is
subject to the risk that controls may become inadequate
because of changes in conditions or that the effectiveness
of their design and operation may deteriorate.
Our consideration of internal control would not necessarily
disclose all matters in internal control that might be
material weaknesses under standards established by the
American Institute of Certified Public Accountants. A
material weakness is a condition in which the design or
operation of one or more of the internal control components
does not reduce to a relatively low level the risk that
misstatements caused by error or fraud in amounts that would
be material in relation to the financial statements being
audited may occur and not be detected within a timely period
by employees in the normal course of performing their
assigned functions. However, we noted no matters involving
internal control and its operation, including controls for
safeguarding securities, that we consider to be material
weaknesses as defined above as of February 29, 2000.
This report is intended solely for the information and use
of the Trustees, management and the Securities and Exchange
Commission and is not intended to be and should not be used
by anyone other than those specified parties.
April 14, 2000
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EXHIBIT 77(O) MORGAN STANLEY DEAN WITTER SMALL CAP GROWTH FUND
10f-3 transactions for the period July 1999- March 31, 2000
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TOTAL
ISSUED/
DATE PRICE SHARES % of PRINCIPAL PURCHASED
SECURITY PURCHASED SHARE PURCHASED Assets AMOUNT BY FUND BROKER(S)
Aclara Biosciences 03/23/00 $ 21.00 3,500 0.000% $ 189,000.000.00 0.003% Deutsche Bank
Allos Therapeutics 03/27/00 $ 18.00 22,000 0.003% $ 90,000,000.00 0.044% SG Cowen Securities
Antigenics Inc. 02/04/00 $ 18.00 2,700 0.005% $ 63,000,000.00 0.077% U.S. Bancorp
Creo Products, Inc. 07/29/99 $ 15.00 15,400 0.059% $ 75,000,000.00 0.308% Salomon Smith Barney
Cypress Communications 02/10/00 $ 17.00 2,000 0.003% $ 170,000,000.00 0.020% Bear Stearns
Diamond Technology Partners 03/22/00 $80.125 20,000 0.013% $ 262,409,375.00 0.010% Goldman Sachs
Diversa Corp. 02/15/00 $ 24.00 5,200 0.012% $ 174,000,000.00 0.071% Bear Stearns
Dobson Communications 02/07/00 $ 22.00 4,200 0.010% $ 550,000,000.00 0.017% Banc of America
Focal Communications 07/27/99 $ 13.00 19,800 0.340% $ 129,350,000.00 0.198% Salomon Smith Barney
Homestore.com 08/04/99 $ 20.00 1,000 0.390% $ 140,000,000.00 0.014% BancBoston Robertson Stephens
Insight Communications 07/21/99 $ 24.50 13,200 0.080% $ 563,500,000.00 0.057% DLJ
Net2phone 07/29/99 $ 15.00 2,200 0.008% $ 81,000,000.00 0.041% Hambrecht & Quist
Radio One Inc. 03/03/00 $ 70.00 54,800 0.003% $ 350,000,000.00 0.010% CS First Boston
Salem Communications 07/01/99 $ 22.50 6,300 0.035% $ 189,000,000.00 0.075% Deutsche Bank
Sequenom Inc. 01/31/00 $ 26.00 900 0.003% $ 136,500,000.00 0.017% Warburg Dillon Read
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