Setting the selected index of a Flex LinkBar control

<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" verticalAlign="middle" backgroundColor="white"> <mx:Array id="arr"> <mx:Object label="One" /> <mx:Object label="Two" /> <mx:Object label="Three" /> <mx:Object label="Four" /> </mx:Array> <mx:ApplicationControlBar dock="true"> <mx:Form styleName="plain"> <mx:FormItem label="selectedIndex:"> <mx:HSlider id="slider" minimum="0" maximum="{linkBar.dataProvider.length - 1}" liveDragging="true" snapInterval="1" tickInterval="1" dataTipPrecision="0" /> </mx:FormItem> </mx:Form> </mx:ApplicationControlBar> <mx:LinkBar id="linkBar" dataProvider="{arr}" selectedIndex="{slider.value}" /> </mx:Application>