      *
      *  Implementations of this property must be Bindable and
      *  they must generate events of type "propertyChange".  
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 10
+     *  @playerversion AIR 1.5
+     *  @productversion Flex 4
      */
     function get contentHeight():Number;
 

     *  @default 0
     *  @see target
     *  @see verticalScrollPosition
     */
    function get horizontalScrollPosition():Number;
    function set horizontalScrollPosition(value:Number):void;

     *  first or last row, use HOME or END.
     * 
     *  @see ScrollUnit
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    function getVerticalScrollPositionDelta(scrollUnit:uint):Number;
     
