1  
   2  public class Player
   3  {
   4    private string _command;
   5    private bool isOpen;
   6   [DllImport("winmm.dll")]
   7  private static extern long mciSendString(string strCommand,StringBuilder strReturn,int iReturnLength, IntPtr hwndCallback);
   8    
   9  public Player()
  10   {
  11     
  12   }
  13  public void Close()
  14   {
  15    _command = "close MediaFile";
  16    mciSendString(_command, null, 0, IntPtr.Zero);
  17         isOpen=false;
  18   }
  19  
  20  public void Open(string sFileName)
  21   {
  22    _command = "open \"" + sFileName + "\" type mpegvideo alias MediaFile";
  23    mciSendString(_command, null, 0, IntPtr.Zero);
  24    isOpen = true;
  25   }
  26  
  27  public void Play(bool loop)
  28   {
  29    if(isOpen)
  30    {
  31     _command = "play MediaFile";
  32     if (loop)
  33      _command += " REPEAT";
  34      mciSendString(_command, null, 0, IntPtr.Zero);
  35     }
  36   }
  37  
  38  }