Simple Hook - Change Client Status

[nimonogi]

Hello,

 

I want a hook to change Client's status to Inactive if he register from register.php?aainactive=yes

 

function new_client($vars)
{
$aauserid = $vars['userid'];

   if($_GET['aainactive'] == "yes")
   {
	$result = full_query("UPDATE tblclients SET status='Inactive' WHERE id='".$aauserid."'");

   }
}

add_hook("ClientAdd",99,"new_client");

 

Can you please help.