It is possible for you to use existing VFP reports, by sending their output to the Adobe Acrobat, or WIN2PDF printer driver to create PDF files.  These files can be downloaded by users and viewed/printed with the PDF viewer, which is a free download.  Although this technique works well with complicated report formats, most developers choose to simply output their reports as HTML code.  Even though HTML provides less typographic control, it is much more efficient and avoids PDF-related problems on the client side.