Filedownload function in WebDynpro

Hello,

How can i download a file on to the C drive which i have as a PDF ( or a smartform ) or in the form of an internal table when running a method of my assistant class of the webdynpro. I dont need to display the table to the users. Just a direct download.

I tried using gui_download function module from one of the methods of the class but it gives me a dump. Can you please let me know.

Thanks,

Amina