在flex里通过addEventListener函数给控件动态加载click事件侦听函数时，除了事件本身传递的Event类型参数外，还需要传递更多的参数,代码如下：

package
{
    public class EventArgExtend
    {
        public function EventArgExtend()
        {
        }
       
        public static function create(f:Function,... arg):Function
        {
               var F:Boolean=false;
               var _f:Function=function(e:*,..._arg)
               {
                   _arg=arg
                   if(!F)
                   {
                       F=true
                       _arg.unshift(e)
                   }
                   f.apply(null,_arg)
               };
               return _f;
          }
          public static function toString():String
          {
               return "Class JEventDelegate";
          }
    }
}

使用的方式：
txtShow.addEventListener(MouseEvent.CLICK,EventArgExtend.create(clickHandler,1,"str"));

            private function clickHandler(e:Event,...arg):void
            {
                Alert.show(arg[0].toString());
                Alert.show(arg[1].toString());
            }

还有另外一个方法，没有封装效果，不过代码更加容易理解：

var sayHello:String = "123456";
btn1.addEventListener(MouseEvent.CLICK,function (e:MouseEvent){clickHandlerWithArg(e,sayHello)});
function clickHandlerWithArg(e:MouseEvent,arg:String):void
{
var out:String= e.target + "发出事件(有参数) :" + arg;
trace(out);
}