Setting up a network to share files and printers?

[Antony]

Ok so i have one desktop computer running xp connected to my wireless router(wired). I also have a laptop running vista also connected to my router(wireless). I want to know (step-by-step) if possible how to acheive sharing between my PC and laptop without installing external software. I have set up a workgroup on my desktop according to a microsoft article i should be able to share using this but i dont know how to connect my laptop to this workgroup OR if there is a different way to achieve this. My main priority is to be able to share all files between my desktop and laptop but i would also like to be able to print from my laptop aswell(which is connected to my desktop computer).