Call to undefined function curl_init()

I've enabled curl in PHP.INI en restarted my machine and Apache.

extension=php_curl.dll

Still I get the following error in my php script:

Call to undefined function curl_init()

I'm running XAMP on Windows XP Pro. Any thoughts?

php_curl.dll is in C:\Program Files\xampp\php\ext extension_dir = "C:\Program Files\xampp\php\ext\"

From serverfault solsol

• The libeay32.dll and ssleay.dll files in your PHP directory must be accessible from somewhere in your PATH variable for cURL to work with Apache. The easiest way to achieve this is to add your PHP directory to your PATH environment variable.

  From zneak