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──Microsoft Foundation Classes──────────────────────────────────────────────
 
  afx_msg void OnParentNotify( UINT  message, LONG  lParam  );
 
  Parameter   Description
 
  <message>   Specifies the event for which the parent is being notified.
              It can be any of these values:
 
              Value            Description
 
              WM_CREATE        The child window is being created.
 
              WM_DESTROY       The child window is being destroyed.
 
              WM_LBUTTONDOWN   The user has placed the mouse cursor over
                               the child window and clicked the left mouse
                               button.
 
              WM_MBUTTONDOWN   The user has placed the mouse cursor over
                               the child window and clicked the middle
                               mouse button.
 
              WM_RBUTTONDOWN   The user has placed the mouse cursor over
                               the child window and clicked the right
                               mouse button.
 
  <lParam>    Specifies the window handle of the child window in the
              low-order word and the identifier of the child window in the
              high-order word if <message> is WM_CREATE or WM_DESTROY;
              otherwise, <lParam> contains the x- and y-coordinates of the
              cursor. The x-coordinate is in the low-order word and the
              y-coordinate is in the high-order word.
 
  Remarks
 
  A parent's OnParentNotify member function is called when its child
  window is created or destroyed, or when the user clicks a mouse button
  while the cursor is over the child window. When the child window is
  being created, the system calls OnParentNotify just before the ◄Create►
  member function that creates CWnd returns. When the child window is
  being destroyed, the system calls OnParentNotify before any processing
  takes place to destroy CWnd.
 
  OnParentNotify is called for all ancestor windows of the child window,
  including the top-level window.
 
  All child windows except those that have the ◄WS_EX_NOPARENTNOTIFY►
  style send this message to their parent windows. By default, child
  windows in a dialog box have the WS_EX_NOPARENTNOTIFY style unless the
  child window was created without this style by calling the ◄CreateEx►
  member function.
 
  This message-handler member function calls the ◄Default► member
  function. Override this member function in your derived class to handle
  the ◄WM_PARENTNOTIFY► message.
 
  See Also
 
  ◄CWnd::CreateEx►, ◄CWnd::OnCreate►, ◄CWnd::OnDestroy►,
  ◄CWnd::OnLButtonDown►, ◄CWnd::OnMButtonDown►, ◄CWnd::OnRButtonDown►,
  ◄WM_PARENTNOTIFY►, ◄CWnd::Default►
 
 
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