Mute Vb/c++/C# application

Question

I need to mute my application because it's using 5 webbrowsers and navigates to sites with flash, this can cause a lot of annoying sound , so I searched everywhere but no luck I want to know if there is a way to mute either my application or my webbrowsers either through vb code or whatever other language (I will make a plug-in). Thanks in advance for your help.

Answer 1

On Windows Vista and later, you can set an individual application's sound volume by calling a function inside winmm.dll

[DllImport("winmm.dll")]
private static extern int waveOutSetVolume(IntPtr hwo, uint dwVolume);

And call following static method:

public static void MuteApplication()
{
  int NewVolume = 0;
  uint NewVolumeAllChannels = (((uint)NewVolume & 0x0000ffff) | ((uint)NewVolume << 16));
  waveOutSetVolume(IntPtr.Zero, NewVolumeAllChannels);
}