Discovering Postgres Server from Windows Clients

Howdy;
We have written an application that uses PG as the backend database.
We currently embed the database servers IP address in a text file that
the installed (created using Inno) uses when setting up the client
programs (ie, stores this info in a local .ini file).

Is there a recommended way of "discovery" a PG server on the network ?

or is it really just as simple as testing port 5432 for range of IP
addresses ?

g.