What is required to use a Windows form application use a SQL Server database thrugh network?

I want to install a SQL Server on 1 PC that has a Windows XP OS as a server. And, through a network I want the application to connect to a database.

So, I know that I should setup .Net Framework 4.0 to the application and I did a deployment to my project. I don't know if I need any application to install to do this connection like a server application or not?

Thanks in advance