using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace 鸣笛
{
class Program
{
static void Main(string[] args)
{
BeepOn.Beep(500, 700);
Console.ReadKey();
}
}
public class BeepOn
{
[DllImport("Kernel32.dll")]
public static extern bool Beep(int a, int b);
}
}