<?xml version="1.0" encoding="utf-8"?>
  <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
  
          <mx:Script>
                  <![CDATA[
                          import mx.effects.Resize;
                          
                          public function resizePanel():void
                          {
                                  var myResize:Resize = new Resize();
                                  myResize.target = myPanel;
                                  myResize.widthBy = 100;
                                  myResize.heightBy = 100;
                                  myResize.play();
                          }
                          
                  ]]>
          </mx:Script>
          
          <mx:Panel id="myPanel" />
          <mx:Button label="Resize" click="resizePanel()" />
          
  </mx:Application>