title: How to open a file in memory?
body: <p>I have see this term branded around but I don't really understand how you open a file in memory.</p>
  
  <p>I have the files written to disk in a temp location but this needs cleaning when a certain form closes and I can't do it when it's open. It's a must that this folder gets emptied. I was wondering if I opened files in memory instead whether it would make a difference?</p>