VMS Help CC, Socket Routines, socket  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Creates an endpoint for communication by returning a special
    kind of file descriptor called a socket descriptor, which is
    associated with a DEC TCP/IP Services for OpenVMS socket device
    channel.

    Syntax:

      #include <types.h>
      #include <socket.h>

      int socket(int af, int type, int protocol);