Best way to debug CTooltipCtrl not showing the tip

Hello All

This is a weird scenario which I cannot understand and I'm looking for a way to debug this and figure it out.

The app is an IE plugin, which is consisted of a BHO and a toolbar. I have a class that inherits from CStatic and extends its functionality as so:

class CMyStatic : public CWindowImpl< CMyStatic , CStatic >
{
   ...
   CToolTipCtrl m_tip;
};

I create the tooltip as so:

        if ( !m_tip.IsWindow() )
        {
            // create a tool tip
            DWORD dwStyle = WS_POPUP | TTS_NOANIMATE | TTS_NOFADE | TTS_NOPREFIX;
            m_tip.Create( m_hWnd, NULL, NULL, dwStyle );
            if ( m_tip.IsWindow() )
            {
                m_tip.Activate( TRUE );
                m_tip.AddTool( m_hWnd, lpszString );
            }
        }

and in response to the mouse events i relay the event:

//MESSAGE_RANGE_HANDLER( WM_MOUSEFIRST, WM_MOUSELAST, OnMouseMessage )

LRESULT CMyStatic::OnMouseMessage( UINT uMsg, WPARAM wParam, LPARAM lParam,BOOL& bHandled )
{
    MSG msg =
    {
      m_hWnd, uMsg, wParam, lParam
    };
    if ( m_tip.IsWindow() )
    {
        m_tip.RelayEvent( &msg );
    }

    bHandled = FALSE;
    return 1;
}

The weirdness comes from the simple fact that i'm using this exact same class (CMyStatic that is) with a different app (an IE infoband) and the tooltip works as expected, on different CStatic controls that I subclass the same exact way as in the other app).

I have no idea why this isn't working - m_tip is a valid window, RelayEvent(..) does get called .. but no tootip is shown.

Any help on how to figure this out would be appreciated.



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