Manually Add Subdomain

Hello,

This is not really related to a problem with cPanel/WHM but a custom script that I am working on. I need to manually be able to add subdomains but I don't know what entries need to be made and where. Obviously I need to add something to the httpd config and the named config but what else. Also, I would like to use an Include line so the entries can be seprate. I know the httpd config accepts that but does the named config accept that?

Thanks for any help!

 

They are going to be in the same directory structure but I have no idea where to start. Where is the script that creates the subdomains (/scripts/ or is it encrypted?) Thanks for the help!