title: how to check the master volume is muted or not
body: <p><em>how to check the master volume is muted in windows 7 OS</em> 
    I have the code for mute or unmute 
    i.e</p>
  
  <pre><code>Public Const APPCOMMAND_VOLUME_MUTE As Integer = &amp;H80000
  Public Const APPCOMMAND_VOLUME_UP As Integer = &amp;HA0000
  Public Const APPCOMMAND_VOLUME_DOWN As Integer = &amp;H90000
  Public Const WM_APPCOMMAND As Integer = &amp;H319
  Declare Function SendMessageW Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal Msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
  MM.SendMessageW(Me.Handle, MM.WM_APPCOMMAND, Me.Handle, CType(MM.APPCOMMAND_VOLUME_MUTE, IntPtr))
  </code></pre>
  
  <p>here i wont to check only mute condition of master valume.</p>
  
  <p>than q in advance.</p>