如何使用Flash(AS3)从远程域调用Flex SWF？

Security.allowDomain("http://example.com");

var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onSWFLoaded);
loader.load(new URLRequest("http://example.com/path/to/your/swf.swf"));

function onSWFLoaded(event:Event):void {
    var loadedSWF:DisplayObject = event.target.content;
    addChild(loadedSWF);
}

[RemoteClass(alias="com.example.YourClassName")]
public class YourClassName {
    // Your class implementation
}

ExternalInterface.call("yourFlexFunction", "parameter1", "parameter2");

function yourFlexFunction(param1:String, param2:String):void {
    // Your function implementation
}