OK, if you want to access files on your Windows box from your Linux box, then you need to use:
mount -t smbfs //computer/sharename mountpoint
So, for example, if I wanted to mount Bob's share called MP3, onto the directory /mnt/mp3, I would type:
mount -t smbfs //BOB/MP3 /mnt/mp3
If, however, you want to access files on your Linux box from your Windows box, then you need to look into Samba. There's more than enough info on this site to get you started on that...