Setting prefix on newthread_post_start

[JamesGunner]

Hey,

Im trying to build a new product where you can set default prefixes to threads. Im a abit puzzled how to set the prefixid when a user posts. So far I have this:

PHP Code:

<installcode><![CDATA[$db->hide_errors();
$db->query_write("ALTER TABLE " . TABLE_PREFIX . "forum ADD default_forum_thread_prefix VARCHAR(300) NOT NULL");
$db->show_errors();]]></installcode> 


This adds my new field in the forum table.I already have the whole frame but I still need the basic function.

PHP Code:

<plugin active="1">
      <title>Default Forum Thread Prefix</title>
      <hookname>forumadmin_edit_form</hookname>
      <phpcode>
        <![CDATA[print_table_header($vbphrase['default_forum_thread_prefix']);
print_input_row($vbphrase['default_forum_thread_prefix_desc'], 'forum[default_forum_thread_prefix]', $forum['default_forum_thread_prefix']);]]>
      </phpcode>
    </plugin> 


The admin area seems to work fine also.

PHP Code:

<plugin active="1">
      <title>Default Forum Thread Prefix</title>
      <hookname>newthread_post_start</hookname>
      <phpcode>
        <![CDATA[
$vbulletin->GPC['prefixid'] = $forum['default_forum_thread_prefix']; 
      $newpost['prefixid'] =& $vbulletin->GPC['prefixid'];
]]>
</phpcode>
</plugin> 


Now this is the part where Im puzzled and I originally wanted to do an query each time but then I thought it might be easier to retrieve the info.

I must say that Im fairly new to php and vbulletin. I only wrote programs with C# and C++ yet so Im still learning the syntax and whatnot.

Thanks for the help ahead.