actionscript 3: Check if an external file exists and if so unhide a movieClip

Question

I'm trying to check if an external file exists and if so change the value of the visibility of a certain movie clip to true. I know how to do it in AS2, but I'm working in AS3.

This is the AS2 code that I used to work with:

onClipEvent (load) {
    fileExists = new LoadVars();

    fileExists._parent = this;

    fileExists.onLoad = function(success) {

        //success is true if the file exists, false if it doesnt

        if (success) {
            _root.visiblity = 1;

            //the file exists
        }

    };

    fileExists.load('visibility.exe');//initiate the test}
}

How to make it work in AS3? Thanks!

Answer 1

Class flash.net.URLLoader. From Adobe ActionScript 3.0 Reference:

var urlRequest:URLRequest = new URLRequest("visibility.exe");
var urlLoader:URLLoader = new URLLoader();
urlLoader.dataFormat = URLLoaderDataFormat.BINARY;
urlLoader.addEventListener(Event.COMPLETE, urlLoader_complete);
urlLoader.addEventListener(IOErrorEvent.IO_ERROR, urlLoader_error);
urlLoader.load(urlRequest);

function urlLoader_complete(evt:Event):void {
   trace("file found");
}

function urlLoader_error(evt:IOErrorEvent):void {
   trace("file obviously not found");
}

Don't forget to import required classes.