Using PHP sessions with BlitzMax

Does anyone know how to make use of PHP sessions with BlitzMax? I have a function that uses ConnectSocket() to send information to the server, so would assume that there is a parameter in the header that I can use to store the session ID that was returned from the server during a previous information call.

Headers that I'm currently sending include:

Host: "+host)
Content-type: application/x-www-form-urlencoded
User-agent: MyApp
Content-length: 100
Pragma: no-cache
Connection: keep-alive

Header settings that are being returned from the sign in call to the PHP script:

HTTP/1.1 200 OK
Date: Sat, 18 Aug 2007 20:07:57 GMT
Server: Apache/1.3.33 (Darwin) PHP/4.4.1
X-Powered-By: PHP/4.4.1
Set-Cookie: PHPSESSID=bf466c8240e4beabe8f18f46d8a49b56; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Connection: close
Content-Type: text/html