import mx.effects.*;
public function createLargeMask(targ:Object,bounds:Rectangle):Shape {
var largeMask:Shape = new Shape();
largeMask.graphics.beginFill(0x00FFFF, 0.5);
largeMask.graphics.drawRoundRect(0, 0, bounds.width + 10,bounds.height - 10, 3);
largeMask.graphics.endFill();
return largeMask;
}