      *  you must specify all four of these properties:
      *  <code>xFrom</code>, <code>yFrom</code>, <code>xTo</code>, 
      *  and <code>yTo</code>. </p>
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 9
+     *  @playerversion AIR 1.1
+     *  @productversion Flex 3
      */
     public var xTo:Number;
     

    /**
     *  Easing function to use for scaling the mask.
     *  @default null
     */ 
    public var scaleEasingFunction:Function;
    

     *  If you override this method, ensure that you call the super method.
     *
     *  @param event An event object of type TweenEvent.
     *  
     *  @langversion 3.0
     *  @playerversion Flash 9
     *  @playerversion AIR 1.1
     *  @productversion Flex 3
     */
    protected function tweenEventHandler(event:TweenEvent):void
    {
