DeckOverlay.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:ApplicationControlBar width="100%" height="40">
 <mx:Button id="aInfoButton" label="Account Panel"
            click="myViewStack.selectedChild=accountInfo;"/>
        <mx:Button id="cInfoButton" label="Customer Info Panel"
            click="myViewStack.selectedChild=custInfo;"/>
        <mx:Button id="searchButton" label="Search Panel"
            click="myViewStack.selectedChild=search;"/>
        </mx:ApplicationControlBar>
	<mx:Panel title="oldViewStack" height="95%" width="95%" 
         paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10" y="48">
      <mx:ViewStack id="myViewStack" borderStyle="solid" width="100%" height="80%">

            <mx:Canvas id="search" backgroundColor="#FFFFCC" label="Search" width="100%" height="100%">
                <mx:Label text="Search Screen" color="#000000"/>
            </mx:Canvas>

            <mx:Canvas id="custInfo" backgroundColor="#CCFFFF" label="Customer Info" width="100%" height="100%">
                <mx:Label text="Customer Info" color="#000000"/>
            </mx:Canvas>

            <mx:Canvas id="accountInfo" backgroundColor="#FFCCFF" label="Account Info" width="100%" height="100%">
                <mx:Label text="Account Info" color="#000000"/>
            </mx:Canvas>
        </mx:ViewStack>

    </mx:Panel>

</mx:Application>