How to realize one main computer and one auxiliary computer in two computer LANs?

Look at the ip of his computer. If it is192.168.1.1,click Start-Run on the computer and enter \192.168./kloc. You create a new folder, then share it, add the permission everyone (generally unnecessary), and then put something in the folder. If not, it depends on which computer can't see other people's things, and whether there is a computer browser service in that computer's service. Check whether two computers are in the same workgroup or domain and right-click my computer-Properties-computer name. If there is a domain or workgroup name below, see Services-Right-click my computer-Administration-Services and Applications-Services.