Determine changes of master sound volume as an event (volume change listener)

I want bind the master sound volume of windows to a slider in my program. So I searched and found some ways to GET or SET master volume + some libraries like these:

• Change master audio volume from XP to Windows 8 in C#


• Handling volume control in C#


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  NAudio

  
  


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  Some where I see a code with LOOP to get volume value: loop

  
  


• Some where I see a code with TIMER to get volume value...


• Also I see some samples to determine volume but after test one of them I saw some errors at runtime in Windows 8: C# – Adjust master volume in Vista and Windows 7

My question is:

What is the best way to simply have the following features in my program (WPF C#.NET 3.5):

• GET master volume value


• SET master volume value


• Determine the master volume changes, like an event and notification

then bind to a slider.....