Posting form with curl that requires work with sessions?

I've written this code to submit a POST form:

(please bare with me, this is an example)

<?php
   $url = 'logging.php';
   $params = "id=dave&password=changeme&lang=USENG";
   $user_agent = "Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)";
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_POST,1);
   curl_setopt($ch, CURLOPT_POSTFIELDS,$params);
   curl_setopt($ch, CURLOPT_URL,$url);
   curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
   $result=curl_exec ($ch);
   curl_close ($ch);
?>

Code (markup):

That would work, but then it doesn't work because when you initially go to the logging.php page it creates a session. Since Curl doesn't have that session the from cannot be logged into. Is there a way to capture the session from the logging.php page, then use curl to submit the form?