Microsoft KB Archive/131155

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PRB: Some OLE Containers Do Not Call IViewObject::Draw

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Q131155

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The information in this article applies to:


 * Microsoft Win32 Software Development Kit (SDK), version 3.5, on platform(s):
 * the operating system: Microsoft Windows NT
 * Microsoft OLE Libraries for Windows and Win32s, version 2.01
 * Microsoft OLE Libraries, used with:
 * the operating system: Microsoft Windows NT 3.5
 * Microsoft Windows 95

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SYMPTOMS
A custom OLE rendering handler finds that its IViewObject::Draw method is never called by some OLE container applications.

CAUSE
Some OLE container applications never call IViewObject::Draw. These applications do not use the caching and drawing services provided by the object handler. Instead, they do their own caching and drawing of the presentations for OLE objects embedded in their documents.

Two examples of such container applications are Microsoft Word version 6.0 and Microsoft Excel version 5.0. They cache metafile representations of embedded OLE objects, and then do their own drawing of those metafiles.

STATUS
This behavior is by design. It is not possible to get Microsoft Word or Microsoft Excel to use a handler's drawing services.

Additional query words: 2.01 3.50 4.00 5.00 6.00

Keywords : kbole kbOSWinNT350 kbSDKWin32 kbOSWin95 kbGrpDSCom kbDSupport kbprb kbOLE200

Issue type :

Technology : kbWin32SDKSearch kbAudDeveloper kbSDKSearch kbWin32sSearch