Re: CToolBarCtrl::GetButtonInfo Bug?

From:
David Lowndes <DavidL@example.invalid>
Newsgroups:
microsoft.public.vc.mfc
Date:
Fri, 26 Oct 2007 12:27:21 +0100
Message-ID:
<6nj3i355jbvgcr3tv7deih39gd79i06phu@4ax.com>

Doing a little more research, I've found the problem.
CToolBarCtrl::GetButtonInfo looks like this:

_AFXCMN_INLINE BOOL CToolBarCtrl::GetButtonInfo(int nID, TBBUTTONINFO*
ptbbi) const
    { ASSERT(::IsWindow(m_hWnd)); return (BOOL) ::SendMessage(m_hWnd,
TB_GETBUTTONINFO, nID, (LPARAM)ptbbi); }

The TB_GETBUTTONINFO msg returns a 0 based index. Whoever wrapped that
message for this class incorrectly decided to cast the result to a BOOL, so
that valid 0 index is returned as FALSE. So the only way to accurately
handle this is to not use the GetButtonInfo method, and just send the msg
yourself.


Torin,

Could you submit a bug report for your findings on the connect web
site. As you say, it clearly looks wrong. I can't see any evidence of
anyone else submitting a report on this, so MS are probably unaware of
it.


So as not to lose this, I've submitted a bug report:

https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=306903

Dave

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