title: Does DSOFile.OleDocumentProperties.Save modify file?
body: <p><code>DSOFile.OleDocumentProperties.Save</code> modifies metadata associated to a file on NTFS.</p>
  
  <p>Does it modify the file itself, meaning that the checksum will change?<br>
  Or does it only modify some NTFS metadata about the file, but the checksum will remain the same?</p>
  
  <p>More about DSOFile: <a href="http://support.microsoft.com/kb/224351" rel="nofollow noreferrer">KB</a>, <a href="http://technet.microsoft.com/en-us/library/ee692828.aspx" rel="nofollow noreferrer">Technet</a></p>
  
  <p><em>Credit: It was actually a self-interrogation by Ilmo within <a href="https://stackoverflow.com/a/13172244/226958">this question</a>.</em></p>