<mx:Application backgroundColor="0xFFFFFF"  xmlns:mx="http://www.adobe.com/2006/mxml">

<mx:Script>
    <![CDATA[

        public var dp:Array = ["Button1","Button2"];

        import mx.controls.Alert;
    ]]>
</mx:Script>

<mx:LinkBar id="bb" creationComplete="bb.dataProvider = dp;" itemClick="Alert.show(ItemClickEvent(event).item + ' clicked')" />

</mx:Application>