In order to allow web access to a different directory outside the root directory, use the Alias directive. The Alias directive will map any directory into the web root.

For example if you want to create a virtual directory called test, and the directory is in the D:/example/test, then modify your httpd.conf and add the following entry at the bottom of the file:

Alias /test D:/example/test

On a typical Windows installation, the httpd.conf file is usually located in the following directory:

C:\Program Files\Apache Software Foundation\Apache2.2\conf\httpd.conf

The URL http://www.example.com/test/dir/file.html will be served from:

D:/example/test/dir/file.html

For more information visit the Apache HTTP Server Version 2.2 documentation.