Deal with winsock and UDP. Write on one PC, no LAN. On the client send a broadcast request:
sockaddr_in broadcast;
// enable broadcasts
int enableBroadcast = 1;
setsockopt(ClientSocket, SOL_SOCKET, SO_BROADCAST, (char*)&enableBroadcast, sizeof(enableBroadcast));
broadcast.sin_family was = AF_INET;
broadcast.sin_port =...