Problems getting GetToolTip() to work

From:
"Drew" <drew.nospam.myers@esrd.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 9 May 2006 17:06:54 -0500
Message-ID:
<O#1yhT7cGHA.3632@TK2MSFTNGP05.phx.gbl>
I have a toolbar that I created in the resource editor that I now
need to have dynamic tooltips. I've subclassed the toolbar
and added this in frame header:

class CMyToolBar : public CToolBar
{
protected:
 afx_msg BOOL GetToolTip(UINT id, NMHDR *pTTTStruct, LRESULT *pResult);
 DECLARE_MESSAGE_MAP()
};

and this in cpp:

BEGIN_MESSAGE_MAP(CMyToolBar, CToolBar)
 ON_NOTIFY_EX(TTN_NEEDTEXT, 0, GetToolTip)
END_MESSAGE_MAP()

BOOL CMyToolBar::GetToolTip(UINT id, NMHDR *pNMHDR, LRESULT *pResult)
{
 char fmt[MSGSTRING_LEN];
 TOOLTIPTEXT *pTTT = (TOOLTIPTEXT *)pNMHDR;
 UINT nID = pNMHDR->idFrom;

 switch(id){
  case ID_BUTTON_I_WANT_TO_CHANGE:
   if(pSC->m_myToolBar.GetToolBarCtrl().IsButtonChecked(ID_BUTTON_I_WANT_TO_CHANGE))
    strcpy(pTTT->szText, "Checked button tooltip");
   else
    strcpy(pTTT->szText, "Unchecked button tooltip");
         pTTT->hinst = NULL;
         return(TRUE);
  break;
 }

 return(FALSE);
}

but this code is never reached. Did I miss a step?

Thanks,
Drew

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