Microsoft KB Archive/142611

= WOW: GP Fault in Ddeml.dll Using Visual Basic Application =

Article ID: 142611

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Server 3.51

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This article was previously published under Q142611





SYMPTOMS
16-bit Windows Visual Basic applications using dynamic data exchange (DDE) for inter-process communications may return a general protection fault (GPF) under Windows NT 3.51.

This problem only occurs using Windows NT 3.51; the application does not fail using Windows NT 3.1 or 3.5



CAUSE
Windows NT 3.51 added error detection code to Ddeml.dll to validate DDE data structures. Applications that previously were successful may now fail with a GPF when passing invalid DDEDATA to DdeFreeDataHandle.



STATUS
Microsoft has confirmed this to be a problem in Windows NT version 3.51. This problem was corrected in the latest Windows NT 3.51 U.S. Service Pack. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: prodnt

Keywords: kbprogramming KB142611

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