Print wirelessly without having buying a wireless printer
In Vista:
First you have to configure a computer which has printer installed on it.
To do that:
1. Right click on "My Computer" and select "Properties"
2. Look for your "computer name", and be sure to write down the computer if its not something easy to remember.
3. Click start---Control Panel---Printer
4. "Right Click" on the printer that you want to share and Click on "Sharing"
5. Create a name for printer or you can leave the default name. Make sure you remember the name of the printer.
6. If there is a option that says "Share this printer to network" make sure check that.

Next--------------------------------------------
Make sure your guest computer is connect to same network as the home computer which has printer installed on it.
1. login into guest computer (laptop, desktop)
2. Click on start---Control Panel---printer
3. Click on add printer
4. Select "Add a network, wireless or bluetooth printer"
5. If you don't see the printer that you shared then click on " The printer that i want isn't listed"
6. Click on " Select a shared printer by name"
7. Make sure type in two backward slash then type in the computer name that you wrote from host computer follow by one backward slash and the printer name of the host computer.
For example: \\computername\printername
breakdown:
\\computername: is the host computer name
\printername: is the printer which is share by host computer