This question is getting so common I can see a new tutorial coming soon....
Well firstly you need all the PCs to have wireless capability using compatible devices. That means have a look at the wireless devices you currently own and check what standard they conform to - the standards are 802.11x where the letter x could be 'a', 'b', 'g', 'n' or something else. Most of these standards are "backwards compatible" which means if you have a wireless 'g' device it will work with your 'b' network for example. It's also best if you can get all the wireless devices from the same manufacturer because that will give you optimum performance.
If your desktop PCs are without wireless then install a PCI wireless card. If the laptops lack wireless you can get PC-card wireless adaptors. USB adaptors are available but several members of BC have reported problems with them so I'm not recommending those.
Then you need a central point for the wireless communication. If you have broadband internet that would be the point to choose - install a wireless router and connect its "WAN" or "Internet" port to your broadband modem. There are a too many variations to go into here because you can get combination devices that include the modem, router, switch, wireless access point etc. If you have broadband talk to your ISP for their recommendation for a wireless router.
If you do not have broadband and won't be getting it for a while all you need is a wireless access point (WAP) which will be the centre of your wireless network. These are cheaper than a wireless router. If you connect the WAP to the PC which has internet access (e.g. dial-up) then you can share that access using the Windows Internet Connection Sharing(ICS) wizard.
When you have the wireless infrastucture set up you need to configure the different wireless units. Their manuals will explain a lot about how to do this. You should choose a name for your wirless network which will become its SSID. I'd strongly recommend you use encryption to stop the whole neigbourhood having access to your files. Either WPA or if that's not available WEP (you must use the same type of encryption on all the devices or they will not work) You need all the computers to be on the same workgroup and you need to enable 'File and Printer sharing' on all of them.
On the PC with the printer attached, share the printer. Then, when the network is functioning, on other PCs you can install a new printer, select a networked printer, browse and you will see the shared printer available to be installed. When the installation has finished you will be able to select that printer when you want to print a document.
The process is not as complicated to set up as it sounds but there may be some unfamiliar terminology to deal with. Post your questions as you go along and we will try to clarify things.
EDIT: I see you already have a wireless router so your good to go.
Edited by Rimmer, 05 January 2006 - 11:35 PM.