public enum MessageBeepType : uint {
      Ok = 0x00000000,
      Hand = 0x00000010,
      Question = 0x00000020,
      Exclamation = 0x00000030,
      Asterisk = 0x00000040,
      Default = 0xFFFFFFFF,
    }

    [DllImport("User32.dll")]
    [return:MarshalAs(UnmanagedType.Bool)]
    public static extern bool MessageBeep(MessageBeepType uType);