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Q295330: BUG: AV in MSVBVM60.dll Using WinInet .ocx in COM DLL

Article: Q295330
Product(s): Microsoft Visual Basic for Windows
Version(s): 6.0,6.0 SP3,6.0 SP4,6.0 SP5
Operating System(s): 
Keyword(s): kbDLL kbDSupport
Last Modified: 17-MAY-2002

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The information in this article applies to:

- Microsoft Visual Basic Enterprise Edition for Windows, versions 6.0, 6.0 SP3, 6.0 SP4, 6.0 SP5 
- Microsoft Windows Internet Services (WinInet) 
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SYMPTOMS
========

You may encounter an access violation if you unload a form that contains the
WinInet ActiveX control when that form is hosted in a Visual Basic Component
Object Model (COM) dynamic link library (DLL) rather than in the main project.

CAUSE
=====

Under certain conditions, destruction of the loaded WinInet control in a COM DLL
may partially fail. The control creates a hidden window that is used for message
handling. Although the control is successfully unloaded under all conditions,
the hidden window may survive the destruction of the control. Because the
window's callback function is destroyed when the control is unloaded, messages
that are sent to the hidden window result in an access violation.

RESOLUTION
==========

A supported fix that corrects this problem is now available from Microsoft, but
it has not been fully regression tested and should be applied only to computers
that are experiencing this specific problem.

NOTE: You must have a Visual Studio license agreement to obtain this fix.

To resolve this problem, contact Microsoft Product Support Services to obtain the
fix. For a complete list of Microsoft Product Support Services phone numbers and
information on support costs, please go to the following address on the World
Wide Web:

  http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

The English version of this fix should have the following file attributes or
later:

  Date      Time    Version      Size    File name     Platform
  -------------------------------------------------------------
                    6.00.8877            Msinet.ocx



STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

Additional query words:

======================================================================
Keywords          : kbDLL kbDSupport 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB600Search kbVB600 kbVB600SP3 kbVB600SP4 kbVB600SP5
Version           : :6.0,6.0 SP3,6.0 SP4,6.0 SP5
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbpending

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