[RESOLVED] Referencing Stage within custom "Global" class

[badaboom55]

Hello All,

I'm new to OOP and I still haven't gotten a handle on coding classes and the appropriate syntax with all the "public" "private" "static" keywords, etc.
Anyway, one thing I miss in AS3.0 is having "out-of-the-box" global variables and functions.
I've read a lot of forums and articles about making a simple "MyGlobal" class that could hold variables and functions which could be called from the timeline as "MyGlobal.doSomething()"
However, I seem to be running into a problem trying to reference "stage" from within one of the global functions... I imagine this is because "stage" is an instance property.
I'm basically trying to add/remove an event listener to the stage whenever the global function "MyFunction" is called.

MyGlobal.as:

package{
    
    import flash.display.*;
    import flash.events.KeyboardEvent;
    
    public class MyGlobal{
        
        public static var objVars:Object = new Object();

        public static function MyFunction(Previous_mc:MovieClip, Target_mc:MovieClip):void{
            // Remove the previous keyboard listener
            stage.removeEventListener(KeyboardEvent.KEY_DOWN, Previous_mc.fOnKeyDown, false);
            // Add a keyboard listener that targets the Target_mc's fOnKeyDown function
            stage.addEventListener(KeyboardEvent.KEY_DOWN, Target_mc.fOnKeyDown, false, 0, true);        
        }
        
    }
    
} 

MyApplication.fla Timeline:

MyGlobal.objVars.myVar1 = "Hello World";
trace(MyGlobal.objVars.myVar1); // output: Hello World

MyGlobal.MyFunction(myMC1_mc, myMC2_mc); 

Compiler Error:

1120: Access of undefined property stage.

Am I missing an import statment, or is there someway I need to declare stage as this.stage?