Access localhost with wordpress install from a virtualbox mac emulator

How can I access a wordpress website running on localhost from safari on a mac install running in virtual box?

Situation:

For developing a wordpress website I am running a windows machine with an Apache webserver. For testing the website in Safari I am running virtual box with mac installed.

Now I need to access http://localhost on my windows machine from the emulator to test the wordpress website. I can do that by accessing http://10.0.2.2 from the safari browser. This works fine for any normal website, but a wordpress website will redirect to the registered 'siteurl', which is 'http://localhost'. So accessing http://10.0.2.2 from the safari browser will redirect to http://localhost and of course there is nothing there for safari within the mac emulator.

I tried changing the ip address of the Apache server to 10.0.2.2, by changing httpd.conf and change Listen 80 to Listen 10.0.2.2:80. This works fine for any other ip address, but with this particular ip address Apache does not start up.

Any ideas?