Microsoft KB Archive/192942

= FIX: A stack overflow occurs when MFC ActiveX control containers enter a state of infinite recursion in Visual C++ =

Article ID: 192942

Article Last Modified on 8/7/2007

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APPLIES TO

 Microsoft Foundation Class Library 4.2, when used with:  Microsoft Visual C++ 6.0 Enterprise Edition

 Microsoft Visual C++ 6.0 Professional Edition

 Microsoft Visual C++ 6.0 Standard Edition 

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This article was previously published under Q192942

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SYMPTOMS
Under certain circumstances, MFC ActiveX control containers will enter a state of infinite recursion that eventually leads to a stack overflow. The symptoms of this are when the position of a control site changes, the program will seemingly hang and eventually produce a stack overflow (0xC00000FD) operating system exception. The stack trace looks like this: <pre class="fixed_text">  COleControlSite::MoveWindow COleControl::XOleInPlaceObject::SetObjectRects COleControl::OnSetObjectRects COleControlSite::MoveWindow ...

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CAUSE
When the position of the control site changes, the container code changes the position of the reflector window (if present) and the tracker rectangles (if present). The control container code eventually calls COleControl::XOleInPlaceObject::SetObjectRects. (See CTLINPLC.CPP in the MFC source.) SetObjectRects makes a call to GetOuterWindow, which returns the reflector window if present. If the reflector window variable is NULL then the same window object is returned, MoveWindow is then called using the returned window object. This causes MoveWindow to be called on itself, resulting in a recursive loop.

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RESOLUTION
One workaround is to copy the Visual C++ 5.0 version of the MFC42.DLL (File version: 4.21.7303) to the home directory of the program experiencing this problem. This will cause the program to use the older version of MFC, instead of the MFC42.DLL that is located in the Windows system directory.

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STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed in this article. This bug has been fixed in the Visual Studio 6.0 Service Pack 1.

To obtain this service pack, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/vstudio/Aa718362.aspx

For more information about Visual Studio 6.0 Service Pack 1, click the following article numbers to view the articles in the Microsoft Knowledge Base:

193009 Visual Studio 6.0 Service Pack 1 Readme

194022 Visual Studio 6.0 service packs, what, where, why

194295 How to tell that a Visual Studio service pack is installed

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MORE INFORMATION
This bug has been found in WordPerfect 8 that ships as part of Corel Office Suite 8. This bug occurs only with the Visual C++ 6.0 version of the MFC42.DLL.

Keywords: kbqfe kbbug kbfix kbnoupdate kbvc600sp1fix kbvs600sp1fix KB192942

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