On-site there is a class available, which you can use in your Drupal pages or elsewhere to display or react on the user's country. Here is an example:
<?php
require_once "class.getCcode.php";
$country = new getCcode;
?>
You come from <?php print $country->Name(); ?> and<br />
your country code is <?php print $country->Code(); ?>, right?
This example would possibly print something like
You come from Norway and
your country code is NO, right?
Remember, in case of Drupal, to set "Input format" to "PHP code".


