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procedure TEnhancedCtrl.Paint;
begin
 inherited Paint;

 Canvas.Brush.Color := Color;
 Canvas.Pen.Color := clBlack;
 with Canvas do
 begin
  Pen.Style := psDash;
  Brush.Style := bsClear;
  Rectangle(0, 0, Width, Height);
 end;
end;					

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  ...
  with Canvas do
  begin
    ...
    if (csDesigning in ComponentState) then Rectangle(0, 0, Width, Height)
      else FillRect(ClipRect));
  end;
  ...