By default, XAMPP installs a read-me (en or de).txt in its default dir structure, along with a cgi-bin dir (and two sample .cgi scripts).

The read-me appears to assume you've read (or will read) the FAQS at http://www.apachefriends.org/en/faq-xampp.html.

Neither is a shining example of the world's finest documentation but both are places to look for your answer. You may wish to follow up by using Google to search for 'xampp tutorial.' The response includes offers a plethora of links.