Data formats

I want to make a communications program for MS-DOS using Qbasic. can you tell me how to write this program? the program must write to a file on an FTP site and it must read from a file on an FTP site. It is best if I can have the program itself. Or better yet, how do I make it so that I can treat an FTP site as a physical drive recognized by dos. Please note that I want to do this without any external drivers required (except modem drivers) and I dont want it to require external programs either.