f you mean that you have a domain - domain.com (substitute your domain!). And you'd like to know how to setup the site info in dreamweaver so you can post your web site...

In this example, your CPanel user name is tom and your domain name is example.com

Substiute your own CPanel user name & domain name!

OK...

Your access type would be: FTP

The FTP host name would be: ftp.example.com

Your user name would be: tom@example.com

Your password would be the same as you use for CPanel.

The host directory is: www/

Hope this helps.