How to load an external SWF?

Most Flash-based virtual worlds (or social games as generally called) allows customization of characters. This means extra work for the artist to create a wide variety of eyes, nose, ears, and mouth — not to mention: hairs, tattoos, masks/helms, and if applicable, armors and weapons.

If all art assets are included inside the main SWF file, it will take a little longer for the game to load. To keep the main SWF file size as low as possible, other art assets are loaded dynamically.

Below is a sample ActionScript 3 code to load external SWF.

package {
  import flash.display.Loader;
  import flash.display.MovieClip;
  import flash.events.Event;
  import flash.events.ProgressEvent;
  import flash.net.URLRequest;
 
  public class Main extends MovieClip {
 
    public function Main() {
      addEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
    }
   
    public function onAddedToStage(e:Event):void {
      var loader:Loader = new Loader();
      loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loader_onProgress);
      loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loader_onComplete);
      loader.load( new URLRequest("SomeExternalAsset.swf") );
    }
   
    private function loader_onComplete(e:Event):void {
      addChild(e.currentTarget.content);
    }
   
    private function loader_onProgress(pe:ProgressEvent):void {
      var loaded:Number = Math.ceil(pe.bytesLoaded / pe.bytesTotal) * 100;
    }
  }
}