Play the WipeLeft effect each time the selected tab changes
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:WipeLeft id="myWL" /> <mx:TabNavigator> <mx:VBox label="A" width="300" height="150" showEffect="{myWL}"> </mx:VBox> <mx:VBox label="B" width="300" height="150" showEffect="{myWL}"> </mx:VBox> <mx:VBox label="C" width="300" height="150" showEffect="{myWL}"> </mx:VBox> </mx:TabNavigator> </mx:Application>