EXHIBIT (a)(3)(IV)

ANNOUNCING . . .

VAN KAMPEN SENIOR FLOATING RATE FUND
COMMENCEMENT OF TENDER OFFER

It is the policy of the Board of Trustees of the Van Kampen Senior Floating
Rate Fund to consider on a quarterly basis whether to make a Tender Offer for
common shares of the Trust. We are pleased to announce that the Board has
authorized the Trust's ninth quarterly Tender Offer commencing on April 20, 2000
for the purpose of providing liquidity to its shareholders. The commencement of
the Tender Offer is announced in today's Wall Street Journal. Shareholders of
the Trust may elect to have the cash proceeds from the Tender Offer invested in
Class C Shares of eligible open-end investment companies advised by either Van
Kampen Investment Advisory Corp. or Van Kampen Asset Management Inc. and
distributed by Van Kampen Funds Inc., subject to certain limitations. Please
note that the Class C Shares acquired pursuant to this election are subject to a
contingent deferred sales charge schedule equal to the Early Withdrawal Charge
schedule of the Trust.

The Trust is offering to purchase up to 23,135,904 of its common shares at
a price equal to the net asset value per common share of the Trust as of 5:00
P.M., Eastern Standard Time on May 19, 2000, the expiration date of the Tender
Offer (unless extended). The Tender Offer and the withdrawal rights expire at
12:00 Midnight Eastern Standard time on May 19, 2000, unless the Tender Offer is
extended. An "Early Withdrawal Charge" will be imposed on most common shares
accepted for payment that have been held for less than one year.

Terms and conditions of the tender offer are contained in the Trust's Offer
to Purchase dated April 20, 2000, and the related Letter of Transmittal. Copies
are available to you upon request by calling Van Kampen's Investor Services
Department at (800) 421-5666.

Shareholders may tender by completing and returning the Letter of
Transmittal by May 19, 2000. Alternatively, Selling Firms may tender account
positions with a wire order redemption via NSCC Fund/SERV or by calling Van
Kampen's Brokerage Operations Support Services at (800) 421-3863, on February
18, 2000 (trade date of the Tender Offer).

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FUND NAME NUMBER SYMBOL CUSIP TENDER START
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VK Senior Floating Rate Fund 259 VKSFR 920960101 4/20/00
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PLEASE DIRECT YOUR TENDER QUESTIONS TO THE FOLLOWING AREAS:

MAIN OFFICE OPERATIONS: BROKERAGE OPERATIONS SUPPORT SERVICES (BOSS) AT (800)
421-3863.

REGISTERED REPRESENTATIVES: INVESTOR SERVICES DEPARTMENT AT (800) 421-5666.

This material is prepared for internal or broker/dealer use only. It may
not be reproduced or shown to members of the public or used in written form as
sales literature. Such use would be in violation of the NASD code of conduct.
This material is subject to change, please consult the prospectus.