See Get Local IP address FAQ #7778.

>Hi gang,
>
>Anybody out there know of an API call to get the IP address of a local machine? For various reasons, it's not practical for one of my clients to shell to DOS, call IPCONFIG and send the output to a file -- so I'm trying to give them another option (g). BTW, they don't use WebConnect, so that's another idea that won't fly (sigh)...
>
>All assistance greatly appreciated --
>
>TIA,