title: DateTime.ToOADate - Time only
body: <p>I have a "DateTime" var with the current date (DateTime.Now).
  I can convert this to a OADate-Format (41392,524432) as example.
  But how I can convert this, that I'm <strong>just</strong> getting the time without the date?
  For example 1 minute and 4 seconds (01:04) are 0,04444444 in this format.</p>