He needs to enable sharing for that printer: on his machine, go to Start >
Settings > Printers. Right-click the printer, select Sharing ...
Then on your machine, go to Start > Settings > Printers. Double-click Add
new printer. Select Network printer and follow the instructions. If your
network is functioning properly, his printer should be listed.
> I do not have a printer of my own, but my son does and his computer is hooked
> up to mine by a wireless router. How do I print my document on his computer
> without putting them on a disk?