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Code from Flex 4 Documentation "Using Adobe Flex 4".
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<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:s="library://ns.adobe.com/flex/spark">
<s:layout>
<s:VerticalLayout />
</s:layout>
<fx:Script>
import flash.display.Sprite;
import mx.core.UIComponent;
private var xLoc:int = 20;
private var yLoc:int = 20;
private var circleColor:Number = 0xFFCC00;
private function addChildToPanel():void {
var circle:Sprite = new Sprite();
circle.graphics.beginFill(circleColor);
circle.graphics.drawCircle(xLoc, yLoc, 15);
var c:UIComponent = new UIComponent();
c.addChild(circle);
panel1.addElement(c);
xLoc = xLoc + 5;
yLoc = yLoc + 1;
circleColor = circleColor + 20;
}
</fx:Script>
<s:Panel id="panel1" height="250" width="300" />
<s:Button id="myButton" label="Click Me" click="addChildToPanel();" />
</s:Application>
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