KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q150100: DOC:Technote 64 Incorrect About ThreadingModel Registration

Article: Q150100
Product(s): Microsoft C Compiler
Version(s): winnt:4.1,4.2
Operating System(s): 
Keyword(s): kbole kbdocfix kbdocerr kbActiveX kbAutomation kbCOMt kbCtrlCreate kbInprocSvr kbMFC kb
Last Modified: 03-AUG-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- The Microsoft Foundation Classes (MFC), used with:
   - Microsoft Visual C++, 32-bit Editions, version 4.1 
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 4.2 
   - Microsoft Visual C++, 32-bit Professional Edition, version 4.2 
-------------------------------------------------------------------------------

SUMMARY
=======

Technote 64 states the following:

  Controls that support apartment-model threading should indicate this
  capability in the registry, by adding the key ThreadingModel with a
  value of Apartment under their class ID registry entry. To cause this
  key to be automatically registered for your control, pass the
  afxRegApartmentThreading flag in the sixth parameter to
  AfxOleRegisterControlClass.


This information is not correct. Apartment-model threading is not supported by
MFC in Microsoft Visual C++ for Windows, version 4.1. The
afxRegApartmentThreading value is not used in this version and the registry is
not modified to reflect apartment-model threading support.

This documentation error was fixed in Visual C++ version 5.0. The following text
was added to Technote 64 in Visual C++ 5.0:

  Note that apartment-model threading is only supported in Visual C++
  versions 4.2 or later.


Additional query words:

======================================================================
Keywords          : kbole kbdocfix kbdocerr kbActiveX kbAutomation kbCOMt kbCtrlCreate kbInprocSvr kbMFC kbVC410bug kbVC420bug kbVC500fix kbGrpDSMFCATL 
Technology        : kbAudDeveloper kbMFC
Version           : winnt:4.1,4.2
Solution Type     : kbfix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.