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Using different creation policies

<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="initButton();">     <mx:Script>                      public function initButton():void {                 newButton.label="creationPolicyAll Button";             }                </mx:Script>     <mx:states>         <mx:State name="creationPolicyAll">             <mx:AddChild relativeTo="{myPanel}" creationPolicy="all">                 <mx:Button id="newButton" />             </mx:AddChild>         </mx:State>         <mx:State name="creationPolicyNone">             <mx:AddChild id="nocreationPolicy" relativeTo="{myPanel}" creationPolicy="none">                 <mx:Button label="creationPolicyNone button" />             </mx:AddChild>         </mx:State>     </mx:states>     <mx:Panel id="myPanel" title="Static and dynamic states" width="300" height="150">         <mx:Button label="Change to creationPolicyAll state" click="currentState = currentState == 'creationPolicyAll' ? '' : 'creationPolicyAll';" />         <mx:Button label="Explicitly create a button control" click="nocreationPolicy.createInstance();" />         <mx:Button label="Change to nocreationPolicy state" click="currentState = currentState == 'creationPolicyNone' ? '' : 'creationPolicyNone';" />     </mx:Panel> </mx:Application>