Accessing Windows NT Programs from AS/40

I am running an AS/400 (740 12-way V4R4) and I need to be able to call programs sitting on an NT box and retrieve parameters back, preferably using TCP/IP.

I know I can write sockets-based TCP/IP communication programs, but is there an easier wayto call an NT program directly from an AS/400?

If it were a simple matter of calling the program blindly, I could use FTP, but I need to call a program with both input and output parameters.

Anyone done this before? Send me full instructions and you get the full points. Point me in a direction that works and you get half points.