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Q67653: How to Respond When DDE Data Cannot Be Locked

Article: Q67653
Product(s): Microsoft Windows Software Development Kit
Version(s): WINDOWS:3.0,3.1
Operating System(s): 
Keyword(s): 
Last Modified: 05-NOV-1999

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The information in this article applies to:

- Microsoft Windows Software Development Kit (SDK) versions 3.0, 3.1 
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SUMMARY
=======

A Dynamic Data Exchange (DDE) client application receives a WM_DDE_DATA message
when the DDE server has data to transmit. The low-order word of lParam contains
the handle to a global memory object containing the data. If the DDE client is
unable to lock the handle to access the data [GlobalLock() returns NULL], the
DDE client should send a negative acknowledgment to the DDE server. A negative
acknowledgment is a WM_DDE_ACK message with the fAck bit set to zero.

DDE is discussed in Chapter 15 of the "Microsoft Windows Software Development Kit
Reference Volume 2."

Additional query words: 3.00 3.10

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Keywords          :  
Technology        : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK300 kbWinSDK310
Version           : WINDOWS:3.0,3.1

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