关闭playsound

关闭playsound Delphi / Windows SDK/API
http://www.delphi2007.net/DelphiMultimedia/html/delphi_20060926164903290.html
 
                    PlaySound(PChar('c:\wav\nottalk.wav'   ),   0,   SND_ASYNC);  
   
  我要怎么样才能关闭播放呢，当然不能关闭程序

PlaySound(nil,   0,   SND_PURGE);