Successfully imported external swf, can not put it into movie clip

Question

Hello all,
I have started learning AS3 and gradually getting used to, trying to put external swf into movie clip.
Successfully imported target swf and put into stage, when I publish this I see target swf is playing.
import flash.display.MovieClip;
var BGLoader:Loader = new Loader();
var BGurl:URLRequest = new URLRequest("HomeBG.swf");
BGLoader.load(BGurl);
BGLoader.y = 0;
BGLoader.x = 0;
addChild(BGLoader);
As next step I want to put this swf into movie clip and get more control, but when I publish bellow only I see is empty background, without any errors.
import flash.display.MovieClip;
var BGLoader:Loader = new Loader();
var BGurl:URLRequest = new URLRequest("HomeBG.swf");
BGLoader.load(BGurl);
BGLoader.y = 0;
BGLoader.x = 0;
//addChild(BGLoader);
var animMC = MovieClip(BGLoader.content).getChildAt(0) as MovieClip;
addChild(animMC);
Is anything missing?
Any help would be appreciated, thanks.

Answer 1

You can only access Loader.content after Load completed successfully.
Try this,
import flash.events.Event;
var BGLoader:Loader = new Loader();
var BGurl:URLRequest = new URLRequest("HomeBG.swf");
BGLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler);
BGLoader.load(BGurl);
BGLoader.y = 0;
BGLoader.x = 0;
//addChild(BGLoader);
var animMC:MovieClip;
function completeHandler(event:Event)
     animMC = event.currentTarget.content;
     addChild(animMC);