How to integrate sqlite extension in XAMPP?

Question

There's an extension on the http://www.sqlite.org/contrib?orderby=date, extension-functions.c, which integrates the SQRT command in sqlite.

How can I integrate this and use it in my Windows-XAMPP Environment?

For the SQL-Queries i use the Firefox-Extension SQLiteManager.

I have created a fiddle with an example of my DB.