title: File association and thumbnail preview in Windows 10
body: <p>I have created an application and associated on registry a file extension on Windows 10, so when you double click a file associated with my extension, it opens my app with the file as parameter.</p>
  
  <p>Now, I want the files associated to my application to behave in Windows 10 just like images - I mean, having a thumbnail preview, so when the user selects "large icons", he would be able to see a preview of the file.</p>
  
  <p>I wonder how can I do it. What kind of metadata my file should have so Windows would recognize it and show a preview. Of course, I don't want just large icons, I want a file preview just like image files. </p>
  
  <p>It isn't hard for me to generate a preview bitmap and integrate it to the file format I created (or even to change the file format completely, since I didn't publish anything yet), but how would windows recognize it? Is this even possible?</p>
  
  <p>Thanks in advance</p>