      * 
      *  When Scroller creates an instance of this part, it will set the
      *  <code>verticalScrollBar</code> skin part to that instance.
+     *
+     *  This property should be considered read-only. It is only
+     *  set by the Scroller's skin. 
+     *  To access the VScrollBar instance, use <code>verticalScrollBar</code>.
      */
     public var verticalScrollBarFactory:IFactory;
     

     *  <code>horizontalScrollBar</code> skin part to that instance.
     * 
     *  This property should be considered read-only. It is only
     *  set by the Scroller's skin.
     */
    public var horizontalScrollBarFactory:IFactory;
    

    //  Touch scrolling methods
    //
    //--------------------------------------------------------------------------
    
    /**
     *  @private
     *  Add touch listeners
