using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace 喇叭响
{
  public partial class Form1 : Form
  {
    public enum BeepType
    {
      SimpleBeep = -1,
      IconAsterisk = 0x00000040,
      IconExclamation = 0x00000030,
      IconHand = 0x00000010,
      IconQuestion = 0x00000020,
      Ok = 0x00000000,
    }

  [DllImport("user32.dll")]
  public static extern bool MessageBeep(BeepType beepType); 
  public Form1()
  {
     InitializeComponent();
  }

  private void button1_Click(object sender, EventArgs e)
  {

     MessageBeep(BeepType.SimpleBeep); 
  }
 }
}

------解决方案--------------------
C# code

    //使用MessageBeep(unit uType):需添加 using System.Runtime.InteropServices;
　　 public const int MB_ICONEXCLAMATION = 48;
　　 [DllImport("user32.dll")]
　　 public static extern bool MessageBeep(uint uType);
　　 MessageBeep( MB_ICONEXCLAMATION );

------解决方案--------------------
探讨


引用:
C# code


//使用MessageBeep(unit uType):需添加 using System.Runtime.InteropServices;
public const int MB_ICONEXCLAMATION = 48;
[DllImport("user32.dll")]
public static extern bool Messa……


------解决方案--------------------
其实非常简单。
C# code

  Console.Beep();//这一句就可以搞定了。