You should research how applications can communicate directly via LAN.
You are in a programming class but make no mention of what level of skills you are learning. I'm suspecting since you don't understand the capabilities available that your programming as well as IT skillset is not to the level you should have for what you
need to know. It's one thing to program and another to understand Computers and devices such as Smart Phones with an IT knowledge of them beforehand well enough to know how to program for them.
Communicating across a LAN is simple using TCP/IP or UDP/IP. However the techniques required to make it work correctly are not in your scope of knowledge and probably you have extremely limited if any knowledge of networking since you asked this question.
For TCP you can use a
TCP Client and
TCP Listener to wait for calls from the TCP Client. UDP has the same capability. You can use the
MSDN Library search engine to search for the UDP equivalent.
However games usually use a server such that players can connect to a server to start a game between two players which would be more difficult and you would need to learn about that.
There's also
System.Net namespace that can be used to get an IP address for a LAN PC's host name for the LAN if the IP address is not known so that two systems apps can connect to each other correctly. Also you will need to use one or possibly two logical
port(s) which is/are not in use by any other applications or services on the PC's in question.
As far as the actual game goes the apps have to connect prior to a game beginning and allowing either player to select whether they will be X or O since the first player that chooses should be the only one allowed to be X or O and I suppose a timestamp would
be needed to determine who chose first if both choose at basically the same time.
Maybe you should practice programming some games that are single player prior to attempting something you don't probably have the skillset for.
Getting Started Tutorials should provide some insight on possibillities with 4 different apps to learn from since Tic/Tac/Toe is fairly simple.
Maybe view some videos to attempt to get an understanding of IP communications. These videos are just for learning C#
The New Boston Videos although they have more videos for a large variety of other learning. You should be able to find videos for learning IP via C# programming on the net.
You also may want to download
WireShark Network Protocol Analyzer for use in analyzing the data sent and received by your apps if necessary. Also note that Firewalls and Anti-Malware/Virus software can block or detect apps as viral in nature depending on their settings so it's possible
you could create an app to run on a LAN PC using the LAN to intercommunicate and the intercommunication could be blocked or the app could be disallowed to run by security software.
La vida loca
