How to create a network drive?

Can anyone give me a step by step guide on how to map a network drive and share it in a lan?(screenshots would be useful), thanks
Answer #1
Here you go: http://www.ohlone.edu/org/infotech/wireless/mapdrivexp.html or http://www2.fe.psu.edu/~feccen/vpn/MapDriveWinXP.htm