How to write an MD5 Hash function in Delphi?

I'm trying to add some security to my datafile for my coursework project. Although I actually don't need to do it, the algorithm I'd like to know anyway. Can anyone explain it, or show a worked example of how to do it? (Like, how does 'Example' become '0a52730597fb4ffa01fc117d9e71e3a9')