[flexcoders] Dynamically convert a String to a Class?

[keith]

I want to convert something like the String "mx.controls.ComboBox" to a 
Class.
I would use this to declare components or other classes at runtime.
*Please don't laugh at me*

//==============================
//In areas where I CAN do this...
//---------------------------------------------
var testA:* = new mx.controls.ComboBox();
addChild(testA);
//==============================

//=====================================
//I want to DYNAMICALLY do the same...
//--------------------------------------------------------
var classname:Class = Class("mx.controls.ComboBox");
var testB:* = new classname();
addChild(testB);
//=====================================

//But get a this type of error---> TypeError: Error #1034: Type Coercion 
failed: cannot convert "mx.controls.ComboBox" to Class.


-- Keith H --