I open Apache -> httpd.conf.

I set:
# Virtual hosts
Include conf/extra/httpd-vhosts.conf.

I create a virtual host.

hosts

127.0.0.1 localhost
127.0.0.1 healthylife.local

httpd-vhosts.conf

<VirtualHost *:80>
ServerAdmin webmaster@localhost.com
DocumentRoot "c:/wamp/www"
ServerName localhost
ErrorLog "logs/localhost-error.log"
CustomLog "logs/localhost-access.log" common
</VirtualHost>

<VirtualHost *:80>
   ServerName healthylife.local
DocumentRoot "e:\Silverstripe\healthylife_project\trunk"
</VirtualHost>

<Directory "e:\Silverstripe\healthylife_project\trunk">
       AllowOverride All
       Order allow,deny
       Allow from all
</Directory>

Result:

Localhost run: http://localhost/
Virtual host don't run: http://healthylife.local/