custom_eh.php
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	<?php

	defined('FULL_PATH') or die('restricted access!');

	/**
	* Custom event handler class
	*
	*/
	class CustomEventHandler extends kEventHandler {

	/**
	* Connection to database
	*
	* @var kDBConnection
	* @access public
	*/
	var $Conn;

	function CustomEventHandler()
	{
	parent::kBase();
	$this->Conn =& $this->Application->GetADODBConnection();
	}

	/**
	* [HOOK] Modify config stored in "categories_config.php" without extending CategoriesEventHandler class
	*
	* @param kEvent $event
	*/
	function OnModifyCategoriesConfig(&$event)
	{
	# get Fields configuration from /core/units/categories/categories_config.php
	$fields = $this->Application->getUnitOption($event->MasterEvent->Prefix, 'Fields');

	# set configuration fields
	$this->Application->setUnitOption($event->MasterEvent->Prefix, 'Fields', $fields);
	}

	}