Windows hosts file not working with ampps server on windows
There is web interface for this inside AMPPS. Just open http://localhost/ampps/ in your favourite browser. And click on Add Domain icon.
I believe you are editing the wrong file on the wrong folder, as the correct path is \Ampps\apache\conf\extra\httpd-vhosts.conf. Regardless, you should not edit this file directly. You can either use the add domain form as suggested, or force ampps into reading a custom vhosts file.
Have a look at this thread for more info:
http://www.softaculous.com/board/index.php?tid=2077&title=Using_multiple_domains