I agree with JODonnell regarding your predicament!
To find out the structure of a table, you should try to LIST the DICTionary of that table. If the application was done by thorough people, there should be an entry for each field, and possibly extra entries for "virtual" fields that are computed or otherwise derived from "real" fields.
To dump some of the file, something as easy as a COPY statement should do, but be advised that you will see strange things, such as variable length fields with a variable amount of subfields, dates coded as integers (not YYYYMMDD character strings) and other oddities.
Conversion programs in Pick Basic are relatively straightforward once you've gotten the hang of them. Typically you are hoping to generate a flat fixed-format text file.
Good luck!