/sys$common/syshlp/helplib.hlb CC, Socket Routines, inet_lnaof  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Returns the local network address portion of an Internet address.

    Syntax:

      #include <in.h>
      #include <inet.h>

      int inet_lnaof(struct in_addr in);