title: Restrict Windows shell extension to folder/drive
body: <p>I'm working on a shell extension that is supposed to display extended properties of files (mostly .jpgs) stored on a virtual drive (think of it as an external harddrive).</p>
  
  <p>Is it possible to register the shell extension in a way that it only kicks in for files of a specific folder/drive (in my case the external harddrive) and leaves the handling of jpgs in other folder to the Windows default shell extension?</p>
  
  <p>Regards,</p>
  
  <p>Sebastian</p>