<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/10/01/applying-an-effect-when-an-hbox-container-is-resized-in-flex/ -->
<mx:Application name="HBox_resizeEffect_test"
        xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white"
        initialize="init();">

    <mx:Script>
        <![CDATA[
            import mx.containers.HBox;
            import mx.containers.HDividedBox;
            import mx.effects.Resize;

            private var hBox1:HBox;
            private var hBox2:HBox;
            private var hDividedBox:HDividedBox;

            private function init():void {
                hBox1 = new HBox();
                hBox1.percentWidth = 100;
                hBox1.percentHeight = 100;
                hBox1.setStyle("backgroundColor", "haloGreen");
                hBox1.setStyle("resizeEffect", Resize);

                hBox2 = new HBox();
                hBox2.percentWidth = 100;
                hBox2.percentHeight = 100;
                hBox2.setStyle("backgroundColor", "haloBlue");
                hBox2.setStyle("resizeEffect", Resize);

                hDividedBox = new HDividedBox();
                hDividedBox.percentWidth = 100;
                hDividedBox.percentHeight = 100;
                hDividedBox.addChild(hBox1);
                hDividedBox.addChild(hBox2);
                addChild(hDividedBox);
            }
        ]]>
    </mx:Script>

</mx:Application>