Mute Windows Volume using C#

c# winforms audio volume
jinsungy picture jinsungy · Sep 30, 2008 · Viewed 34.2k times · Source

Anyone know how to programmatically mute the Windows XP Volume using C#?

Answer

Jorge Ferreira picture Jorge Ferreira · Sep 30, 2008

Declare this for P/Invoke:

private const int APPCOMMAND_VOLUME_MUTE = 0x80000;
private const int WM_APPCOMMAND = 0x319;

[DllImport("user32.dll")]
public static extern IntPtr SendMessageW(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);

And then use this line to mute/unmute the sound.

SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle, (IntPtr) APPCOMMAND_VOLUME_MUTE);

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