Enable virtual host

step 1:
first include vhost file in to httpd.conf by uncommenting the following line:
Include conf/extra/httpd-vhosts.conf
step 2:
open c:/wamp/bin/apache/conf/extra/httpd-vhosts.conf
<VirtualHost *:80>
ServerAdmin webmaster@dummy-host2.example.com
DocumentRoot "C:\Wamp\www\southamstudios_v3"
ServerName swinburne2.southam.com
ErrorLog "logs/southam.com-error.log"
CustomLog "logs/southam.com-access.log" common
</VirtualHost>
step 3: Restart apache service
step 4: do the host entry in 
C:\Windows\System32\drivers\etc
127.0.0.1       swinburne2.southam.com


<VirtualHost *:80>
        ServerName gradpak.com
ServerAlias www.gradpak.com
ServerAlias organization.gradpak.com
        ServerAdmin support@gradpak.com
        DocumentRoot  "C:\wamp\www\gradpak"
        <Directory  "C:\wamp\www\gradpak">
        Options FollowSymLinks
                Allow from all
                AllowOverride All
                Order allow,deny
                Require all granted
        </Directory>
</VirtualHost>