Edit: I\'ve come to realize the main problem I\'m facing is that I want a text field that already exists in a movieclip or on the stage to take the string from a flashvar. F
var uid:String;
// your code
this.loaderInfo.addEventListener(Event.COMPLETE, loaderComplete);
// your code
function loaderComplete(e:Event=null):void
{
var fv = stage.loaderInfo.parameters;
uid = fv['uid'] || "'uid' not found";
}