Thread: Making simple client-server program

Hello people,
I'm making simple client server program. I have done this before.
I have two computers in home LAN and want to test it.
Computer A on which server program is located has 192.168.0.2 IP address
Computer B on which is client program has IP: 192.168.0.1.
Aplication is simple and basically it just send/receive strings.
Everything works OK if I on client side do something like this:

Code:

he = gethostbyname ("192.168.0.2");	
server_adresa.sin_family = AF_INET;     
server_adresa.sin_port = htons (PORT_NUM); 
server_adresa.sin_addr = *( (struct in_addr * ) he->h_addr );

But this solution require me to know server address in advance and to hard coded it.
Is there any way, and API function (Windows) which can help me to do this dinamically.
I know that is hard.
Basically I want this:
On Computer A I want to open port and listen, and on computer B when I start client program to try to connect to server over home LAN.
I don't think there is a simple way to do this, but just want your advice.
Thanks