title: How to send a command to a running application via commandline
body: <p>Salve!  I want to exit my GUI application (vb.net 4) using a commandline parameter.  I should send this from the commandline:</p>
  
  <pre><code>myapplication.exe quit
  </code></pre>
  
  <p>-and an already running instance of the application should exit.
  Now, I have a mutex detection in place so that I can only have one instance of the application running at a time.  It seems that if I send a commandline, it won't work on an already running application; it will only work on one that is launching.</p>