intl extension php_intl.dll with wamp

I want to use Moodle, but I get an error during the installation process: > php_extension->intl->should be installed and enabled for best results. > Intl extension is used to improve internationalization support, such as locale aware sorting. When I click on the link, I get the error message above: `http://docs.moodle.org/24/en/admin/environment/php_extension/intl` I followed that link, but I still get the same error. If anyone has any ideas, please help me out.