Laptop Computer Table How Do You Connect A Router To A Desktop And Laptop Computer?

How do you connect a router to a desktop and laptop computer? - laptop computer table

I have Road Runner internet service Wireless G Broadband Router. I try to connect a router on my desktop, so it is able to use the internet on my laptop. If I'm not in my office in my laptop to show that the office is there. Someone please help me with this. Thank you.