How to pass a variable to template?

[L1teHawk]

Wow, thanks for the lightning fast response!

Ok, I did this:

PHP Code:

// global at the top
global $vbulletin;

// now I can use $vbulletin
$memname = $vbulletin->db->query_first("SELECT * FROM "
                 . TABLE_PREFIX . "mainapptable WHERE userid = '"
                  . $post['userinfo']['userid'] . "'"); 

// register the variable
vB_Template::preRegister('memberaction_dropdown',
                                          array('memname' => $memname)); 


And in my template:
<vb:if condition="$memname['app']">Found app!</vb:if>

Which doesn't work. I also tried {vb:raw memname.app} which didn't work either. Why is it so hard to pass data to a template

Edit: postbit_display_start is the correct hook right?