title: File MD5 checksum
body: <p>In <a href="https://stackoverflow.com/questions/392657/md5-hashing-in-delphi-2009">this question</a> is mentioned the wcrypt2.</p>
  
  <p>What I need is simply calculate the MD5 of a file. It would be perfect if I could calculate it without having to save it because it is a downloaded file in stream format.</p>
  
  <p>I would like to have the most straightforward way to do that.</p>
  
  <p>Thanks!</p>