ACC1x: GP Fault with PostMessage() to an ADK Application

 Last reviewed: June 8, 1997
Article ID: Q105520
The information in this article applies to:
  • Microsoft Access Distribution Kit version 1.1

SYMPTOMS

If you attempt to close a Microsoft Access Distribution Kit application by sending a WM_CLOSE message from another application using the PostMessage() Windows API function call, a general protection (GP) fault will occur.

The sample code 

   x = PostMessage(hWnd, WM_CLOSE, 0, 0)
will result in a GP fault when run in languages such as Microsoft Visual Basic, Microsoft Windows C, or Access Basic.

RESOLUTION

Use the WM_DESTROY window message instead of the WM_CLOSE message to close a run-time application. The following sample code demonstrates how to use the WM_DESTROY message: 

   x = PostMessage(hWnd, WM_DESTROY, 0, 0)

STATUS

Microsoft has confirmed this to be a problem in the Microsoft Access Distribution Kit version 1.1. This problem no longer occurs in the Microsoft Access Developer's Toolkit version 2.0.

REFERENCES

Microsoft Windows version 3.1 "Programmer's Reference," Volume 2

Additional query words: GPF ADK
Keywords : EvnGpf kberrmsg kbprg PgmApi
Version : 1.1
Platform : WINDOWS
Hardware : X86
Issue type : kbbug
Resolution Type : kbworkaround

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Last reviewed: June 8, 1997
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