Samba has special shares just for printers, and these are configured in the [printers] section of SWAT. There is also a share under [printers] called printers which governs common printer settings. Print shares always have the printable parameter set to yes. The default smb.conf [printers] share section looks like this:
[printers]
comment = All Printers
path = /var/spool/samba
printable = Yes
browseable = No