Article: Q157893
Product(s): Microsoft C Compiler
Version(s): 4.20
Operating System(s):
Keyword(s): kbole kbCtrl _IK920 kbVC kbVC420bug kbGrpDSToolskbbuglist kbfixlist
Last Modified: 04-AUG-2001
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The information in this article applies to:
- The Microsoft Foundation Classes (MFC), included with:
- Microsoft Visual C++, 32-bit Enterprise Edition, version 4.2
- Microsoft Visual C++, 32-bit Professional Edition, version 4.2
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SYMPTOMS
========
When opening or closing a project in Developer Studio, you may see an access
violation with the following error message:
[ASCII 147]MSDEV CAUSED AN INVALID PAGE FAULT IN MODULE
MSVCRES.DLL at 0137:503126ba.[ASCII 148]
This behavior occurs if the Properties window for a ControlWizard- generated
ActiveX Control is invoked in the dialog editor.
CAUSE
=====
This is due to a bug in the MFC 4.2 libraries.
RESOLUTION
==========
To obtain this patch, please refer to the following article in the Microsoft
Knowledge Base:
Q156934 Visual C++ 4.2b Patch
The problem occurs because IOleObject::SetClientSite(NULL) does not release its
existing pointer to ambient property interface. For example,
COleControl::XOleObject::SetClientSite(NULL) doesn[ASCII 146]t call
pThis->m_ambientDispDriver.ReleaseDispatch();.
The problem was fixed by adding the following line to
COleControl::XOleObject::SetClientSite in the MFC source code:
// Release existing pointer to ambient property dispinterface.
pThis->m_ambientDispDriver.ReleaseDispatch();
if (pClientSite != NULL)
STATUS
======
Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This bug was corrected in Visual C++ 4.2B patch.
MORE INFORMATION
================
Steps to Reproduce Problem
--------------------------
1. Create a new ActiveX Control using Control Wizard, and then build the control
to register it.
2. Create a new MFC Control Container application, and insert this OLE control
into the About box.
3. Double-click on the control to bring up the Properties window. Click on any
tab of the Properties window.
4. Close the project workspace, open a new project workspace, or close Developer
Studio. Note that Developer Studio crashes with a page fault message.
If you have an existing project that has a Control Wizard-generated control built
with Visual C++ 4.2 in a dialog resource, click on the [ASCII 147]Control[ASCII
148] tab in the Properties window for the control, and then close the project,
open a new project, or close Developer Studio.
Additional query words: 4.20 vcfixlist420 kbdsi
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Keywords : kbole kbCtrl _IK920 kbVC kbVC420bug kbGrpDSTools kbbuglist kbfixlist
Technology : kbAudDeveloper kbMFC
Version : 4.20
Issue type : kbbug
Solution Type : kbfix
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