Get Class by external load .swf

GetClassBySWF.as

package {
  import flash.display.Sprite;
	import flash.display.Loader;
	import flash.display.LoaderInfo;
	import flash.net.URLRequest;
	import flash.display.MovieClip;
	import flash.events.Event;

	import flash.system.ApplicationDomain;

	public class GetClassBySWF {
		private var swfPath:String = "YOUR_SWF_PATH.swf";
		private var loader:Loader;
		private var ur:URLRequest;

		public function SunNeon()
		{
			ur = new URLRequest(swfPath);
			loader = new Loader();
			loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onComplete);
			loader.load(ur);
		}

		private function onComplete(event:Event):void{
			var swfTarget:LoaderInfo = event.target as LoaderInfo;
			var appDomain:ApplicationDomain = swfTarget.applicationDomain as ApplicationDomain;
			var YOUR_CLASS:Class = appDomain.getDefinition("YOUR_CLASS_NAME") as Class;

			var mc:MovieClip = new YOUR_CLASS() as MovieClip;
		}
	}
}