Looking for online education for subdomains

Hey all,
I have googled and googled and can't seem to find what i am looking for. I am hopeing someone can give me a better item to google or knows a site i can read. I am trying to figure out how they make subdomain accounts. I saw this website where you sign up and log in and you go to your own subdomain name. There you can build a site from premade templates and it has it's own storage and so on. I am wandering how they do that. I mean the linking from subdomain to subdoamin and a genreal WYSWYG intergrated into the site. Any help where I can read up on this would be great.
Thanks
Smurf

This can be done with DNS wildcards, but you need full control over your server in order to do it.

look in to somthing like cpanel

I'm new to this forum .. mmm ... not sure whether it's allowed to post helpful links in text or no .. well mods please warn me if this is wrong, but don't bann my account. I had learned this from here:
nerdydork.com/setting-up-wildcard-dns-subdomains-on-cpanel.html
hope this is helpful :)

Thanks! I didn't even know where to start, google has given me some great links. I can't wait until the day I know all that you guys know!
Thanks Again!

You have to check the DNS settings of your web hosting.

check on your cpanel session and create new sub domains

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