FIX: Call to CWnd::MoveWindow Causes Stack Overflow

ID: q192942

The information in this article applies to:

The Microsoft Foundation Classes (MFC), included with:
- Microsoft Visual C++, 32-bit Editions, version 6.0

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:


   COleControlSite::MoveWindow
   COleControl::XOleInPlaceObject::SetObjectRects
   COleControl::OnSetObjectRects
   COleControlSite::MoveWindow
   ...

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.

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.

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 the Visual Studio 6.0 Service Pack 1.

To obtain this service pack, please see:

http://msdn.microsoft.com/vstudio/sp/default.asp

For more information on the Visual Studio 6.0 Service Pack 1, please see the following articles in the Microsoft Knowledge Base:

Q193009 INFO: Visual Studio 6.0 Service Pack 1 Readme

Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packa Are Installed

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 : kbole kbVC600 kbVS600sp2 kbVS600sp2bug kbVS600sp2fix kbVS600SP1fix kbMFC600bug kbVC600SP1Fix
Version : winnt:6.0
Platform : winnt
Issue type : kbbug