Maximum PC

I have two computers at home, one is using wireless connection while other is using wired connection. I want to make the computers share a printer,files, etc, and able to play games through LAN. Is it possible ? and how?

Is the printer going to stay on, and be constantly connected to a computer? If not, you will need a Print Server.

My recommendation is to use File and Printer Sharing. It is rather easy to set up, but requires both the computer and printer to be on. Here is a guide on how to set it up in Windows XP. Here is a guide on how to do this in Windows Vista.

As for the second part of your question, I'm not sure what you mean? Do you mean play the game on a different computer or over the Internet facing a different person?

sounds like my network at home. What Hackman said, but here's a visual:

Cable modem -> wireless router -> print server (-> printer), computers including one Mac, game systems, all a combination of wired and wireless connections

I also have file and print sharing enabled. I can print any time I want but to share files, the pc with the files on it must be on.