[Adrian Schneider]

-Add field to database

See KirbyDE's post above (best done with install code though)

-Add the form element to newthread...

Edit the newthread template and add your field.

-Clean data, place into GPC array:

Hook: newthread_post_start

PHP Code:

$vbulletin->input->clean_array_gpc('p', array(
    'fieldname' => TYPE_UINT
));
$newpost['fieldname'] = $vbulletin->GPC['fieldname']; 


-Set datamanager value:

Hook: newpost_process

PHP Code:

if ($type == 'thread')
{
    $dataman->setr('fieldname', $post['fieldname']);
} 


-Validate the field for the datamanger (if you don't you get an error):

Hook: threadfpdata_start

PHP Code:

$this->validfields['fieldname'] = array(TYPE_UINT, REQ_NO); 


-Replace every occurance of "fieldname" with your form element name (preferably have it the same as the database field you make), and also replace every occurance of TYPE_UINT with how you want to clean your data.