hello all,
i am zero when it comes to networking

I want to share files between two laptops connected to the wireless network. i tried doing it the easy way ie cable from laptop to router. but when i type the ip address of the other laptop, it says 'network path not found' . how do i do it without the cable.
I have the LAN setup across the street so is it possible to access the files of LAN through the wireless network. I know about VPN but that deals with the internet and stuff..?
Thanks.