Someone

package {
	import flash.display.Sprite;
	import flash.events.MouseEvent;
	
	public class AnonymousListener extends Sprite {
		public function AnonymousListener() {
			// Add an anonymous function to the stage instance's
			// listener list
			stage.addEventListener(MouseEvent.MOUSE_MOVE,
									function(e:MouseEvent):void {
										trace("mouse move");
									},
									false,
									0,
									true);
		}
	}
}