Change tooltips at runtime

Need to override the OnToolTipText()

virtual afx_msg BOOL OnToolTipText(UINT nID, NMHDR* pNMHDR, LRESULT* pResult );

    ON_NOTIFY_EX_RANGE( TTN_NEEDTEXTW, 0, 0xFFFF, OnToolTipText)
    ON_NOTIFY_EX_RANGE( TTN_NEEDTEXTA, 0, 0xFFFF, OnToolTipText)

BOOL CToolTipView::OnToolTipText(UINT nID, NMHDR* pNMHDR, LRESULT* pResult )
{
    ASSERT ( pNMHDR->code == TTN_NEEDTEXTA || TTN_NEEDTEXTW );
	
    TOOLTIPTEXTA* pTTTA = ( TOOLTIPTEXTA *)pNMHDR;
    TOOLTIPTEXTW* pTTTW = ( TOOLTIPTEXTW *)pNMHDR;
	
    CString strTipText;
    CString strMessage;
	
    if( GetToolText(pNMHDR->idFrom, strTipText, strMessage))
    {
#ifndef _UNICODE
        if(pNMHDR->code == TTN_NEEDTEXTA)
            lstrcpyn(pTTTA->szText,strTipText,_countof(pTTTA->szText));
        else
            _mbstowcsz(pTTTW->szText,strTipText,_countof(pTTTW->szText));
#else
        if(pNMHDR->code == TTN_NEEDTEXTA)
            _wcstombsz(pTTTA->szText,strTipText,_countof(pTTTA->szText));
        else
            lstrcpyn(pTTTW->szText,strTipText,_countof(pTTTW->szText));
		
#endif
		
		// change status bar message here, need a pointer to CMainFrame
		// SetMessageText(strMessage);
		
		// ok we handled the message, return TRUE
		return TRUE;
	}
	
	// we did NOT handle the message, pass it on, this is important, don't miss it!
	return CToolTipView::OnToolTipText(nID,pNMHDR,pResult);
	
}

Here we do the actual work of changing the text. Each Item must be handled and can be done by a switch.

BOOL CToolTipView::GetToolText( UINT nID, CString& strTipText, CString& /*strMessage*)
{
    CString strFullString;
	
    switch( nID )
    {
	case ID_FILE_NEW:  // have to handle all toolbar tool tip messages here
	case ID_FILE_OPEN:
	case ID_FILE_SAVE:
	case ID_EDIT_CUT:
	case ID_EDIT_COPY:
	case ID_EDIT_PASTE:
	case ID_FILE_PRINT:
	case ID_APP_ABOUT:
		if (strFullString.LoadString(nID))
			AfxExtractSubString ( strTipText, strFullString, 1,'\n');
		break;
		
        // demonstrates how to change the tool tip for a specific button 
	case ID_CHANGE_TOOL_TIP:
		// local CString containg the new text, which you can set anytime at runtime
		// and will be displayed here when the user puts the mouse on the button.
		strTipText = m_strNewToolTipText;
		
		// if the user tried to enter a zero legth string, it could
		// cause confusion, so put the default sring back in
		if ( strTipText.GetLength()  ==  0 )  // then  put back the default string
		{
			if (strFullString.LoadString (ID_CHANGE_TOOL_TIP))
				AfxExtractSubString ( strTipText, strFullString, 1,'\n' );
		}
		break;
    }
	
    return TRUE;
}

A Note!

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