using System;
using System.Threading;
using System.Runtime.InteropServices;
 
namespace ConsoleApplication1
{
    partial class Program
    {
        enum MessageBeepType
        {
            Ok = 0,
            OkCancel = 1,
            Hand = 0x10,
            Question = 0x20,
            Exclamation = 0x30,
            Asterick = 0x40,
            Mask = 0xf0,
        }
 
        static void MessageBeepAndSleep()
        {
            _messageBeep(MessageBeepType.Asterick);
            _messageBeep(MessageBeepType.Exclamation);
            _messageBeep(MessageBeepType.Hand);
            _messageBeep(MessageBeepType.Mask);
            _messageBeep(MessageBeepType.Ok);
            _messageBeep(MessageBeepType.OkCancel);
            _messageBeep(MessageBeepType.Question);
        }
 
        static void _messageBeep(MessageBeepType beepType)
        {
            MessageBeep(beepType);
            Thread.Sleep(1000);
        }
 
        //[DllImport("kernel32.dll")]
        //static extern bool Sleep(UInt32 dwMilliseconds);
 
        [DllImport("user32.dll")]
        static extern bool MessageBeep(MessageBeepType beepType);
    }
}