FIX: Problems with ToolTips on Windows 95

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

SYMPTOMS

When you run an MFC Application on Windows 95 with ComCtl32.dll version 4.00 and MFC42x.dll version 4.21.7022, the following behavior occurs.

Debug version of the application:

Assertion on line 383 and/or 402 in Tooltip.cpp.
Tooltips are not displayed.

Tooltips are not displayed.

CAUSE

MFC 4.21 uses a new version of CommCtrl.h (version 1.2) which has modified the TOOLINFO structure. When MFC tries to add a tool to the ToolTip using this new structure, the call fails.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been corrected in Visual Studio 97 Service Pack 1.

For additional information about the Visual Studio 97 Service Pack 1, please see the following article in the Microsoft Knowledge Base:

Q170365 INFO: Visual Studio 97 Service Packs - What, Where, and Why

© Microsoft Corporation 1997, All Rights Reserved.
Contributions by Sridhar S. Madhugiri, Microsoft Corporation

Additional query words: tooltip assert

Keywords : kbprg kbMFC KbUIDesign kbVC kbVC500bug kbVS97sp1fix
Version : 5.0
Platform : NT WINDOWS
Issue type : kbbug