using System;
using System.Runtime.InteropServices;
调用 Interaction.Beep();

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 );

调用Beep(Int freq,int duration)函数

??[DllImport("kernel32.dll")]
??public static extern bool Beep(int freq,int duration);

Beep(800,300);

调用PlaySound(string pszSound,int hmod,int fdwSound)
??[DllImport("winmm.dll")]
??public static extern bool PlaySound(string pszSound,int hmod,int fdwSound);
??public const int SND_FILENAME = 0x00020000;
??public const int SND_ASYNC = 0x0001;

PlaySound("提示时奏幻想空间.WAV",0,SND_ASYNC|SND_FILENAME);