PRB: MFC ActiveX Document Servers Require Compound File Support

• The Microsoft Foundation Classes (MFC), included with:
  • Microsoft Visual C++, 32-bit Editions, versions 4.2, 4.2b, 5.0, 6.0

SYMPTOMS

When you save an ActiveX Document that does not use compound files from Internet Explorer functioning as an ActiveX Document Container, the file will be saved in compound document format. Subsequent attempts to load the file in Internet Explorer results in the exception "Unexpected File Format."

Microsoft Binder will not load the document.

CAUSE

The MFC ActiveX Document Server classes normally require compound file support.

RESOLUTION

Add a call to EnableCompoundFile(TRUE) in the document constructor:

   CScribDoc::CScribDoc()
   {
        // ...
        EnableCompoundFile(TRUE);
   } 

MORE INFORMATION

Creating a new ActiveX Document server or regular OLE embedding server in AppWizard selects compound file support by default. The assertion problem occurs if compound file support was deselected when the project was initially created.

© Microsoft Corporation 1999, All Rights Reserved.
Contributions by Jason Strayer, Microsoft Corporation

Additional query words:

Keywords : kbole kbActiveX kbMFC kbVC420 kbVC500 kbVC600 AXSDKDocObjects
Version : 4.2 4.2b 5.0 6.0
Platform : NT WINDOWS
Issue type : kbprb