IIS equivalent of VirtualHost in Apache
Create a new virtual host:
iis manager --> (local computer) --> right-click Web Sites --> New --> Web Site
Check/change/add hostname information (the other hostname to recognize) on a virtual host:
iis manager --> (local computer) --> Web Sites --> right-click/properties on one of the sites --> Web Site --> Advanced --> "Multiple identities for this Web site"
In IIS 7, you will add in Bindings on the right side Actions column, Edit Site while the desired Site is selected.