Reiterating thru a directory

Hi all

If a user has all his/her games installed in c:\games, for example, how would I loop or scan that dir, or other selected directory, for all the subfolders in that directory?

I.E. I want to write an app that scans a directory and displays all of the subfolders in that directory. Kinda like scanning for any installed games that are in a specified location.

Thanks!