Microsoft KB Archive/171514

= FIX: Visual Basic 5.0 Crashes When Shutting Down Forms =

Article ID: 171514

Article Last Modified on 5/12/2003

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APPLIES TO


 * Microsoft Visual Basic 5.0 Control Creation Edition
 * Microsoft Visual Basic 5.0 Learning Edition
 * Microsoft Visual Basic 6.0 Learning Edition
 * Microsoft Visual Basic 5.0 Professional Edition
 * Microsoft Visual Basic 6.0 Professional Edition
 * Microsoft Visual Basic 5.0 Enterprise Edition
 * Microsoft Visual Basic 6.0 Enterprise Edition

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This article was previously published under Q171514



SYMPTOMS
Closing a modal form in the Visual Basic 5.0 design environment may cause one of the following errors:

"Access Violation: Unhandled exception in VB5.EXE 0xC0000005: Access Violation" (Windows NT4)

-or-

"VB has caused an invalid page fault in module VB5.EXE at 0137:00419f1e" (Windows 95, Windows 98, and Windows Me)



CAUSE
Visual Basic is trying to get the thread data from a control after it has been unloaded. The error code that signaled that the control got unloaded is not handled properly.



STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Visual Studio 97 Service Pack 2.

For more information on the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

170365 : INFO: Visual Studio 97 Service Packs - What, Where, and Why

For a list of the Visual Basic 5.0 bugs that were fixed in the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

171554 : INFO: Visual Basic 5.0 Fixes in Visual Studio 97 Service Pack 2



MORE INFORMATION
The Threed32.ocx control shipped with Visual Basic 4.0 is required in order for this behavior to occur.

A sample that reproduces this behavior is not available because this behavior tends to occur sporadically, and usually only in large, complex projects.

Keywords: kbbug kbfix KB171514

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