HElp needed..

I was wondering how I can get my database variables back into the form input fields so a user can modify the data. Anyone have a solution? ....What I am trying to say is... If I have a form that has 5 fields that a user can input information which is dumped into a Mysql database. Lets say this database has 100 records and we want to modify one of the records. I would like the values of that record passed back to the form to appear in the field boxes so the user can just modify the field they want instead of entering all the info again into the form.