Enable/Uncomment virtualhost settings below at httpd-vhosts.conf file and change the values accordingly.
##<VirtualHost *:80>
##ServerAdmin
postmaster@dummy-host.localhost
##DocumentRoot "C:/xampp/htdocs/dummy-host.localhost"
##ServerName dummy-host.localhost
##ServerAlias
OpenDNS
##ErrorLog "logs/dummy-host.localhost-error.log"
##CustomLog "logs/dummy-host.localhost-access.log" combined
##</VirtualHost>
Be sure to include httpd-vhosts.conf under httpd.conf (note that these are different config files)
# Virtual hosts
Include "conf/extra/httpd-vhosts.conf"
Open the port and you're good to go. If not, trial and error comes in.
Good luck.