   ______________255

 4,1.     


       _________________________

    -    OnMouseMove 
                 ______'______

    -    OnMouseMove 
                          ^                 ______

    -    OnMouseMove 
                 ______________

                OnExit     _
OnEnter   
OnMouseDown   

              OnClick   
j                          '         OnMouseUp   

 OnMouseMove      -
       , ,    -
   .         -
,  ,    ,  .

    ,   , 
          -
 .    OnMouseDown  OnMouseUp 
,           
   .

   4.1    ,  
   DragMode (.  4.4)  dmManual (
  ),     .   
  dmAutomatic (   ),
   ,    , 
:

OnMouseDown   OnStartDrag

OnMouseMove    OnDragOver  ,  -
   

OnMouseUp       OnDragDrop ,  
  (   -
    ),  -
  OnEndDrag ,  

 OnExit  OnEnter   ,  
  .     OnClick.

     ,   , -
  .     .   4.4.

  ,    4.1,    , -
       ,     OnExit 
OnEnter.          OnMouse-
Down,       OnClick  OnMouseUp.