  *  @eventType mx.events.SliderEvent
  *  
  *  @langversion 3.0
- *  @playerversion Flash 9
- *  @playerversion AIR 1.1
- *  @productversion Flex 3
+ *  @playerversion Flash 10
+ *  @playerversion AIR 1.5
+ *  @productversion Flex 4
  */
 [Event(name="thumbRelease", type="spark.events.TrackBaseEvent")]
 

 *  @eventType spark.events.TrackBaseEvent
 *  
 *  @langversion 3.0
 *  @playerversion Flash 9
 *  @playerversion AIR 1.1
 *  @productversion Flex 3
 */
[Event(name="thumbDrag", type="spark.events.TrackBaseEvent")]


    {
        super.focusInHandler(event);
        
        addSystemHandlers(MouseEvent.MOUSE_WHEEL, system_mouseWheelHandler, stage_mouseWheelHandler);
    }
    
    /**
