Programmatic FTP

Do any of you know of a tool that you can reference from ASP vbScript to FTP
a file sitting on the server to another server somewhere that has an open
FTP port?

DETAIL:
I have a content management system I wrote that runs only on a Windows box.
New client must stay with his host who only runs Linux boxes.
I want to modify my engine so that when he is on the admin side and saves
changes to a page, an HTML page is generated and FTP'd over to that Linux
server.