xmlns:s="library://ns.adobe.com/flex/spark"
      xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
 
  
 
 
      import mx.utils.UIDUtil;
   
   private function createUID():void {
    lbl.text = UIDUtil.createUID();
   }
   
   private function getUID():void {
    lbl2.text = UIDUtil.getUID(lbl.text);
   }
  ]]>
 
 
 
 
 

参考：

http://blog.minidx.com/2008/11/04/1603.html

http://blog.minidx.com/2008/11/05/1604.html