如何使用WPF静音Windows？

I am learning C# and WPF and had an idea for a little utility. I want a big red button that will do only one thing: completely mute/un-mute all Windows sounds (system beeps, WMP, DVD player, etc...) I've explored the object browser in VS 2008 but can't seem to find what I need: A mute that will affect all of Windows.I am learning C# and WPF and had an idea for a