键盘事件

package {
	import flash.display.Sprite;
	import flash.events.KeyboardEvent;
	public class example extends Sprite
	{
		public function example (){
			stage.focus = this;
			addEventListener(KeyboardEvent.KEY_DOWN,onKeyDown);
		}
		private function onKeyDown(event:KeyboardEvent):void{
			trace("key down:"+event.charCode);
		}
	}
}