wireless router and printer sharing

How to link 2 computers using a wireless router?

I have a wireless router, adapter and 2 computers. the main computer is connected directly to the router and other computer is connected via wireless adapter, the router is connected to the modem( all according to the instruction of Belkin). I want to system link both computers. I need detailed instructions to set up a LAN for use for file sharing, printer sharing and network gaming.

if the comps are conn to the same router they are all ready a lan
Just look the network IP’s

Tutorial: Sharing a Printer Over a Network (Windows)

router

Configure Router: Firmware & Access