rcp remote unix copy command

I'm looking for info to implement the unix remote-copy command on Windows 3.11
using Delphi (winsock2 or dwinsock). My questions are: 1/ what is the port no.
for rcp, 2/ once a tcp/ip socket connection is made to the port, what are the
protocols or syntax to tell the unix that I want to transfer files?

Thanks in adv for any suggestions and answers.

Ahn.