Detect Rt Mouse in Dialog

I am trying to detect a right mouse button cllick in an edit control within a dialog.
I have coded :
BEGIN_MESSAGE_MAP
   On_WM_RBUTTONDOWN()
  ...
END_MESSAGE_MAP

-- in dialog class definition --
Protected:
  afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
  ...

-- in dialog class coding --
void CSect2::OnRButtonDown(UINT nFlags, CPoint point)
{
    CWnd*  pCurWnd;

   pCurWnd = WindowFromPoint(point);
   if (pCurWnd == GetDlgItem(IDC_ITEM))
   {
       ......
   }

In debug mode, I get a break if mouse cllick is in dialog window outside of the edit control, but no break if mouse click is in edit control.
How do I detect a right mouse click in the edit control ?
Any help is appreciated.  Thanks.