How to detect external SWF has stopped not using totalFrames

Question

Trying to find a way to detect when an externally loaded SWF has stopped. Using "totalFrames" like the example below doesn't work for what I'm trying to accomplish.
I need something that simply listens and detects when the clip has stopped. Editing the external SWF is not an option. Thanks in advance for any insight.
function onfrm( evnt: Event ): void
if (newMC.currentFrame == newMC.totalFrames )
newMC.removeEventListener( Event.ENTER_FRAME, onfrm);
trace("End of banner");

Answer 1

Just did a small test, and at least with loading a swf that has a timeline the totalFrames option works fine:
var m:MovieClip;
var a:Loader = new Loader();
a.contentLoaderInfo.addEventListener(Event.COMPLETE, done);
a.load(new URLRequest("anim.swf"));
function done(e:Event):void
  m = MovieClip(a.content);
  m.addEventListener(Event.ENTER_FRAME, chek);
  addChild(m);
function chek(e:Event):void
  if(m.currentFrame == m.totalFrames){
  trace("done");
  m.removeEventListener(Event.ENTER_FRAME, chek);