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tooltips assert in tooltip.cpp line 383

When ever I position my mouse over a tool bar button of a debug build, an assert from tooltip.cpp line 383 is triggered.    The line referenced is the last line in the "if" block below.   Anyone know what is causing this?   I've tested this using a fresh "App Expert created project" and get the same results.

      if (!pToolTip->SendMessage(TTM_GETTOOLINFO, 0, (LPARAM)&ti))
            {
                  ASSERT(ti.cbSize == sizeof(TOOLINFO));
                  ASSERT(ti.uFlags == TTF_IDISHWND);
                  ASSERT(ti.hwnd == m_hWnd);
                  ASSERT(ti.uId == (UINT)m_hWnd);
                  VERIFY(pToolTip->SendMessage(TTM_ADDTOOL, 0, (LPARAM)&ti));
            }

I am using MSVC 5.0 (but I get the same results with version 4.2)    I've also recently reinstalled Windows 95 and MSVC 5.0.
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JohnWeidner
Asked:
JohnWeidner
1 Solution
 
JohnWeidnerAuthor Commented:
The problem turned out to be that an incompatible mfc42d.dll file had been installed into my c:\windows\system directory.    After replacing that file, the problem went away.
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elf_kCommented:
In the release build I guess there is no tooltips at all?
I've got the same error when install my app on a fresh copy of old Windows 95. Probable cause - incorrect version of comctl32.dll. I avoid this problem by installing MSIE 3.01 (or higher) - it updates this dll. Suppose it helps.
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PriyeshCommented:
This is microsoft documented. You won't get any tooltips in the release build but it will bomb all the way in a debug build. This is because of the older version of comctl32.dll. As elf_k has pointed, U can get a comctl installer pack from the microsoft site which upgrades u'r comctl32.dll to the latest one.. or u install ie4. If u wish to distribute u'r app with an installation, u should go for the common control installer from microsoft which is freely downloadable..
   Best wishes.
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