Index: image_captcha/image_captcha.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/captcha/image_captcha/image_captcha.module,v
retrieving revision 1.25
diff -u -r1.25 image_captcha.module
--- image_captcha/image_captcha.module	14 May 2009 22:47:38 -0000	1.25
+++ image_captcha/image_captcha.module	21 Jun 2009 18:50:13 -0000
@@ -187,9 +187,14 @@
           '#required' => TRUE,
           '#size' => 15,
         );
+        $result['captcha_validate'] = 'image_captcha_foo';
         return $result;
       }
       break;
 
   }
 }
+
+function image_captcha_foo($solution, $response) {
+  return $response == 'foo';
+}