title: How to track application usage?
body: <p>I would like to develop an application (that runs at all times in the background I guess) to track the usage of applications (msword, excel, powerpoint, *.exe, etc.).</p>
  
  <p>I can handle posting the data to a database but don't exactly know where to start with monitoring running applications (when they start, when they stop).  Anyone have any clues?</p>