How do I save a file, through a web based program?

Say if I have a ActiveX Document Exe,
and I put it on a website, which files do i need to upload?

Multiple Choice
a) The .vbd file
b) The .exe file
c) Both

also, how do I save data into a directory, so that it can be reused later. i.e. for an weh based Guestbook

please help :)