      * 
      *  @param thumbPos A number representing the new position of
      *  the thumb button in the control.
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 10
+     *  @playerversion AIR 1.5
+     *  @productversion Flex 4
      */
     override protected function positionThumb(thumbPos:Number):void
     {

     *  @param localY The y position relative to the track.
     *
     *  @return The position of the thumb button.
     */
    override protected function pointToPosition(localX:Number, 
                                                localY:Number):Number

    
    /**
     *  The size of the thumb button, which equals the height of the thumb button.
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    override protected function calculateThumbSize():Number
    {
