title: Delphi: how to find and format DBGrid field
body: <p>I use DBGrid with Delphi XE2 to show some query results.
  In the result some (integer) Fields represent a duration in seconds that I want to show in some format like "hh:mm:ss"
  I don't know in advance the fields order since the queries may be different but I know the fields name that I want to format.
  What is the most efficient way to do it ?</p>