>I know how to get a list of Tables into an Array. Is there a similar way to get a list of Directories into an Array, or even into a file?

If you have long-term interests in this area, I recommend you look into Windows Script Host, and the powerful FileSystemObject. It takes you way beyond ADIR() instead giving you an object model for the file system. You can enumerate drives, folders and files and perform lots of cool tasks.

Another advantage to learning this beast is you can use it everywhere, such as in VB or an ASP page.