automation of sending text file to the other business.

Hi,

I have to send daily a text file to the other business through the secure websiite(to which we have UserId and password). We are doing it manually, is there any way to automate the entire task to send the text file with out any user interaction. Can I use Win32 Internet Functions to send it to their FTP Server. Sending that way is it secure?. Please guide me if is there any other way of doing that.

Thanks,
Sam.