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

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          : kberrmsg kbprg 
Version           : 1.1
Platform          : WINDOWS 
Issue type        : kbbug

Last Reviewed: March 26, 1999