pch.h

enumerates Plug-n-Play RS-232 devices that are compliant with the current revision of Plug and Play

#include <ntddk.h>
#include <devioctl.h>
#include <initguid.h>
#include <wdmguid.h>
#include <ntddser.h>
#include <stdarg.h>
#include <stdio.h>
#include "serenum.h"