[Nutrox]

 
Following on from Codemonkey's look at the Delegate class, I actually use my own delegate-like class for fixing scope. This version allows you to pass custom arguments to the target method without overwriting any arguments that Flash might spit out, the standard Delegate class will overwrite those arguments.

Here is the AS2 class:

class cs.utils.Scope
{
    public static function rewire(scope:Object, func:Function):Function
    {
        var args:Array = [];
 
        if (arguments.length > 2)
        {
            args = arguments.splice(2, arguments.length - 2);
        }
        return function()
        {
            return func.apply(scope, args.concat(arguments));
        }
    }
} 

A good example of how to use the class would be with the XML.onLoad event:

import cs.utils.Scope;
 
var xml:XML = new XML();
xml.ignoreWhite = true;
xml.onLoad = Scope.rewire(this, xmlLoadHandler, "Hello!", xml);
 
xml.load("file.xml");
 
function xmlLoadHandler(word:String, xmlFile:XML, success:Boolean):Void
{
    if (!success)
    {
        // D'oh!
    }
    else
    {
        trace(this);           // _level0
        trace(word);           // output: Hello!
        trace(xmlFile == xml); // output: true
        trace(this == xml);    // output: false
    }
} 

As you can see the scope of the xmlLoadHandler will be _level0 instead of the XML object. Your custom arguments will be passed to method before any of the default ones that Flash might send (i.e. success).