Custom Fields and Dedicated ip field

[djshadowxm81]

I really could use some help figuring out how to pull the data out of the dedicated ip field or alternately a custom field, either way im not sure how to pull data out of either for my custom module.

function burstnet_AdminServicesTabFields($params) {

   $result = select_query("mod_customtable","",array("serviceid"=>$params['serviceid']));
   $data = mysql_fetch_array($result);
   $var1 = $data['var1'];

   $fieldsarray = array(
    'VPS Ip' => '<input type="text" name="modulefields[0]" size="30" value="'.$var1.'" />',
   );
   return $fieldsarray;

}

function burstnet_AdminServicesTabFieldsSave($params) {
   update_query("mod_customtable",array(
       "var1"=>$_POST['modulefields'][0],
   ),array("serviceid"=>$params['serviceid']));
}

 

if i do it that way, well then it just fails and doesnt store the values anywhere. I'm at a loss here and not sure what to do because I cant really find any detailed documentation on this specific field or how to use custom fields properly.