      *  @param localY The Y position relative to the scrollbar control.
      *
      *  @return The position of the thumb button.
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 10
+     *  @playerversion AIR 1.5
+     *  @productversion Flex 4
      */
     override protected function pointToPosition(localX:Number, 
                                                 localY:Number):Number

     *  @see mx.core.IViewport
     *  @see mx.core.IViewport#horizontalScrollPosition
     *  @see mx.core.IViewport#getHorizontalScrollPositionDelta()
     */
    override public function page(increase:Boolean = true):void
    {

     *
     *  @see IViewport#contentWidth
     *  @see IViewport#width 
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    override protected function viewportContentWidthChangeHandler(event:PropertyChangeEvent):void
    {
