Microsoft KB Archive/102572

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Changes Between Win 3.1 and WFW 3.1 Versions of DDEML

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Q102572

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The information in this article applies to:


 * Microsoft Windows Software Development Kit (SDK) 3.1

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SUMMARY
The following changes have been made from the Windows 3.1 version of DDEML to the version that shipped with Windows for Workgroups (WFW) version 3.1:


 * The default shutdown timeout was changed from 3,000 milliseconds to 30,000 milliseconds.
 * DdeQueryConvInfo added support for the new hwnd and hwndPartner fields.
 * DdeQueryConvInfo added more robust handling for improper setting of the CONVINFO structure's cb field when called.
 * Rewrote DdePostAdvise to supply the correct count of remaining transactions to be processed on the same topic!item!format name set for the XTYP_ADVREQ transaction.
 * Disallow synchronous calls if the application is shutting down, or if already in the middle of a synchronous transaction.
 * DdeUninitialize was fixed to defer processing if called while in the middle of a synchronous transaction.
 * DdeUninitialize was fixed to dispatch any pending DDE messages and to make necessary callbacks before quitting.
 * Added call to DdeUninitialize from within DdeClientTransaction when in the middle of a synchronous transaction and DdeUninitialize had been called.
 * Allow any instance to call DdeCreateStringHandle.
 * Have DdeAbandonTransaction only mark abandoned transactions, rather than trying to remove the transaction from internal structures.
 * Alter PostMessage overflow queuing to queue based on target instead of on the same task, so that one target queue overflow does not bog down all PostMessage calls.

Additional query words: 3.10

Keywords : kb16bitonly

Issue type :

Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310