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Chapter 7 — Programming

154 CN2B Mobile Computer User’s Manual

ID Field Values

The id field of lpInBuf may be one of the following values:

ID Field Values

ITC_REGISTRY_SAVE_ENABLE

This function enables or disables the save registry to non–volatile media feature of the RegFlushKey() function. lpOut-

Buf must be set to zero (FALSE) if the feature is to be disabled or one (TRUE) if the feature is to be enabled.

ITC_ WAKEUP_MASK

This IOCTL sets a bit mask that represents the mask for the five programmable wakeup keys. The I/O key is not a pro-

grammable wakeup key. By default it is always the system resume key and all other keys are set to disable key wakeup.

A zero in a bit position masks the wakeup for that key. A one in a bit position enables wakeup for that key. lpOutBuf

must point to a buffer that contains a byte value of a wakeup mask consisting of the OR’ed constants as defined in

OEMIOCTL.H. Only the following keys are programmable as wakeup events.

#define SCANNER_TRIGGER1

#define SCANNER_LEFT2

#define SCANNER_RIGHT4

#define GOLD_A18

#define GOLD_A20x10

IOCTL_HAL_GET_DEVICEID

This IOCTL returns the device ID. There are two types of device IDs sup-

ported, which are differentiated based on the size of the output buffer. The

UUID is returned if the buffer size is set to

sizeof(UNIQUE_DEVICEID), otherwise the oldstyle device ID is returned.

Usage

#include “pkfuncs.h”

#include “deviceid.h”

Syntax

BOOL KernelIoControl( IOCTL_HAL_GET_DEVICEID,LPVOID

lpInBuf,DWORD nInBufSize,LPVOID lpOutBuf,DWORD

nOutBufSize,LPDWORD lpBytesReturned );

Parameters

lpInBuf Should be set to NULL. STRICT_ID settings are not supported.

lpInBufSize Should be set to zero.

lpOutBuf Must point to a UNIQUE_DEVICEID structure as defined by DEVICEID.H if the UUID is to

be returned.

nOutBufSize The size of the UNIQUE_DEVICEID in bytes if the UUID is to be returned. A DEVICE_ID as

defined by PKFUNCS.H is returned if the size in bytes is greater than or equal to

sizeof(DEVICE_ID).

lpBytesReturned The number of bytes returned by the function.

Return Values

Returns TRUE if function succeeds. Returns FALSE if the function fails.

GetLastError() may be used to get the extended error value.

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Intermec CN2B Manual de usuario Pagina 172