subdomain name entry in DNS server

Hi all,
I'm tying to add dns a A record to a dns server running on Solaris 10 on sun's SPARC machine i want to do the following add host name to point to an IP address for a machine running win2k3 both machines have real IPs and exposed to the internet where can i add the A records on DNS server on the box running solaris10 what files needs modifications and what procedures do i need to take in consideration please note theres already exist a domain name in the DNS server all i want to do is adding subdomain as follows sub.example.tld
Thanks in adavnce for your help

Assuming its a single entry (as i read in your post) you can just add that entry in the db file for the tld. Locate this in the named.conf for the zone, then edit that file with your editor of choice. Add an A record for the host you need, you might consider adding a PTR in the corresponding reverse zone. You will need to reload the DNS service (or HUP it).

i've found something useful hereSolaris DNS Server Installation and Administration