BitmapData problem!

programming flash
1

Hi gang. I’m tring use the BitmapData. The BitmapData.loadBitmap load some images but i need he loads a movieclip, not bitmap. It’s possible? My complete code works some with bitmap, not with movieclips.

import flash.display.BitmapData; 
var linkageId:String = "aa"; 
var myBitmapData:BitmapData = BitmapData.loadBitmap(linkageId); 
trace(myBitmapData instanceof BitmapData); 
myBitmapData.draw(linkageId); 
// true 
var mc:MovieClip = this.createEmptyMovieClip("mc", this.getNextHighestDepth()); 
mc.attachBitmap(myBitmapData, this.getNextHighestDepth()); 
// 
this.onMouseMove = function() { 
   trace("0x"+myBitmapData.getPixel(_xmouse, _ymouse).toString(16)); 
};