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
Parameter Information:
dwFreq
Windows NT:
Specifies the frequency, in hertz, of the sound. This parameter must be in the range 37 through 32,767 (0x25 through 0x7FFF).
Windows 95:
The parameter is ignored.
dwDuration
Windows NT:
Specifies the duration, in milliseconds, of the sound.
Windows 95:
The parameter is ignored.
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
