Microsoft KB Archive/167650

From BetaArchive Wiki
< Microsoft KB Archive
Revision as of 16:33, 18 July 2020 by 3155ffGd (talk | contribs) (importing KB archive)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Knowledge Base

FIX: Problems with ToolTips on Windows 95

Article ID: 167650

Article Last Modified on 11/21/2006


  • Microsoft Foundation Class Library 4.2, when used with:
    • Microsoft Visual C++ 5.0 Enterprise Edition
    • Microsoft Visual C++ 5.0 Professional Edition

This article was previously published under Q167650


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.

Release version of the application:

Tooltips are not displayed.


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.


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:

170365 INFO: Visual Studio 97 Service Packs - What, Where, and Why

(c) Microsoft Corporation 1997, All Rights Reserved. Contributions by Sridhar S. Madhugiri, Microsoft Corporation

Additional query words: tooltip assert

Keywords: kbbug kbfix kbnoupdate kbtooltip kbuidesign kbvs97sp1fix KB167650