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──Microsoft Foundation Classes──────────────────────────────────────────────
 
  afx_msg void OnMDIActivate( BOOL  bActivate, CWnd*  pActivatedWnd,
                              CWnd* pDeactivatedWnd  );
 
  Parameter         Description
 
  <bActivate>       When the client window calls a child window's
                    OnMDIActivate member function, <bActivate> is TRUE if
                    the child is being activated and FALSE if it is being
                    deactivated.
 
  <pActivatedWnd>   When the application calls its MDI client window's
                    OnMDIActivate member function, <pActivatedWnd>
                    contains a pointer to the MDI child window to be
                    activated. When received by an MDI child window,
                    <pActivatedWnd> contains a pointer to the child window
                    being activated. This pointer may be temporary, and
                    should not be stored for later use.
 
  <pDeactivatedWnd> When received by an MDI child window,
                    <pDeactivatedWnd> contains a pointer to the child
                    window being deactivated. This pointer may be
                    temporary, and should not be stored for later use.
 
  Remarks
 
  An application calls the multiple document interface (MDI)
  CMDIFrameWnd::MDIActivate member function to activate a different MDI
  child window. The OnMDIActivate member function is called for the child
  window being deactivated and the child window being activated.
 
  An MDI child window is activated independently of the MDI frame window.
  When the frame becomes active, the child window that was last activated
  with a OnMDIActivate call receives a ◄WM_NCACTIVATE► message to draw an
  active window frame and caption bar, but it does not receive another
  OnMDIActivate call.
 
  This message-handler member function calls the ◄Default► member
  function. Override this member function in your derived class to handle
  the ◄WM_MDIACTIVATE► message.
 
  See Also
 
  ◄CMDIFrameWnd::MDIGetActive►, ◄CMDIFrameWnd::MDINext►,
  ◄CMDIFrameWnd::MDIActivate►, ◄WM_MDIACTIVATE►, ◄CWnd::Default►
 
 
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