Main.as

public function Main():void {
	var loader:Loader = new Loader();
	loader.load(new URLRequest("TestToLoad.swf"));
	loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoaded);
}

private function onLoaded(e:Event):void {
	e.target.removeEventListener(Event.COMPLETE, onLoaded);

	var TestClass:Class = e.target.applicationDomain.getDefinition("com.illuzor.test.LoadedClass") as Class;
	var loadedClassInstance:Object = new TestClass() as Object;

	trace(loadedClassInstance.getTestNumber());
	trace(loadedClassInstance.getTestText());
	trace(loadedClassInstance.testGetterVar);
}