AS3 使用命名空间

 import flash.display.MovieClip;
 import flash.display.SimpleButton;
 import flash.events.*;
 import flash.media.Video;
 import flash.net.NetConnection;
 import flash.net.NetStream;
 import com.raoway.Slider;
 use namespace rw_internal;
 public class Player extends MovieClip
 {
  rw_internal var __playBtn:SimpleButton;
  rw_internal var __pauseBtn:SimpleButton;
  rw_internal var __progressBar:Slider;