VMS Help TCPIP Services, Programming Interfaces, Sockets API, 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.
    Format
      #include  <in.h>
      #include  <inet.h>
      int inet_lnaof  ( struct in_addr in );

  Additional Information (explode) :

• Argument
• Description
• Return Value