, , , , _______________________999

//    
obj = (TWinControl *)List->Items[i];

i

HandleAllocated

    
 TWinControl



bool   fastcall HandleAllocated(void);



 HandleAllocated   ,   
   .   ,   true.

   Handle   ,   
  ,  .  HandleAllocated  -
      .

HandleNeeded

  ,      
 TWinControl



void _fastcall HandleNeeded(void);



 HandleNeeded   ,      . 
       CreateHandle -
 ,       .

Hide

  
 TControl



void _fastcall Hide(void) ;



 Hide   ,   false  
Visible.       ,   -
    .

   ,      -
.

IndexOf

      