      *   
      *  @default 0
      *  @see horizontalScrollPosition
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 10
+     *  @playerversion AIR 1.5
+     *  @productversion Flex 4
      */
     function get verticalScrollPosition():Number;
     function set verticalScrollPosition(value:Number):void;

     *  first or last column, use HOME or END.
     * 
     *  @see ScrollUnit
     */
    function getHorizontalScrollPositionDelta(scrollUnit:uint):Number;
    

     * 
     *  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 contentWidth():Number;
    
