title: Delphi notification when a file gets updated
body: <p>My app contains documents in its database. The users can open the documents in which case, the document gets saved to a temporary folder and gets opened on the user's computer.</p>
  
  <p>I'd like to get a notification when one of these temporary files are changed, and offer the user to save the changed document back to the database.</p>
  
  <p>What is the most simple way to do this in Delphi7? (I suppose it requires some shell magic or 3rd party component)</p>
  
  <p>Thanks!</p>