Oracle Forms

Pls someone help me! i have an issue, i want a user to select his desired folder through the file dialog box and in that location i want to create a CSV file.

though creating the CSV file is not a problem for me.. but i cant get the pathname of the folder which user chooses..

I tried using GET_FILE_NAME function but it is not giving me the pathname of that folder unless i choose a file which is residing inside that folder..But my requirement is just to get the path of that folder and then create my own CSV file out there.

Please help me as soon as possible.