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Use Slider to change vertical Scroll Position

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:s="library://ns.adobe.com/flex/spark">     <mx:String id="txt">This is a test.</mx:String>     <mx:HSlider id="slider" minimum="0" maximum="{group.contentHeight - group.height}" liveDragging="true"/>          <s:DataGroup id="group" width="100" height="100"                  clipAndEnableScrolling="true"                  itemRenderer="spark.skins.spark.DefaultItemRenderer">         <s:layout>             <s:VerticalLayout id="vLayout" verticalScrollPosition="{slider.value*10}" />         </s:layout>                  <s:dataProvider>             <mx:ArrayCollection source="{txt.split(' ')}" />         </s:dataProvider>              </s:DataGroup>      </mx:Application>