In order to run HC panel with hc.domain.com please follow the steps given below.

- Go to DNS manager  domain.com zone file.

- Add Host A record in the zone file of domain.com with the name hc

- Go to IIS :: Hosting controller website properties :: and add the new Host Header record.

- In the new IP field select the IP on that your website domain.com is running

- Under Port field give 80

- Under Host Header value give hc.domain.com. and click ok

This will make HC panel to run at the URL hc.domain.com

Case 2:
If you want that every new domain should automatically access HC Panel like http://hc.domain.com then follow these instructions

- Login in HC Panel as Host

- Navigate to the menu My Server :: General Settings :: Admin Virtual Directory Settings, here choose option ' admin.domain.com '

- In next step specify control panel access as "hc" under "My Server :: Configure Web Server".