.

Summary

Generates simple tones on the speaker.

C# Signature:

[DllImport("kernel32.dll")]
static extern bool Beep(uint dwFreq, uint dwDuration);

VB Signature:

Declare Function Beep Lib "kernel32.dll" (dwFreq As Integer, _
   dwDuration As Integer) As Boolean

Notes:

Unlike MessageBeep, this function is synchronous. (It doesn't return control to its caller until the sound finishes.)

Tips & Tricks:

Please add some sample code!

Sample Code:

The following sample plays the PC speaker in a series of ascending frequencies:

using System;

using System.Runtime.InteropServices;

class BeepSample

{

    [DllImport("kernel32.dll")]
    static extern bool Beep(uint dwFreq, uint dwDuration);

    static void Main()
    {
        Console.WriteLine("Testing PC speaker...");
        for (uint i = 100; i <= 20000; i++)
        {
            Beep(i, 5);
        }
        Console.WriteLine("Testing complete.");
    }

}

Added by David C. Carachi

Alternative Managed API:

System.Console.Beep, coming in v2.0 (Whidbey) of the .NET Framework

Documentation

Beep on MSDN