1/* 2 * ntddbeep.h 3 * 4 * Contributors: 5 * Created by Casper S. Hornstrup <chorns@users.sourceforge.net> 6 * 7 * THIS SOFTWARE IS NOT COPYRIGHTED 8 * 9 * This source code is offered for use in the public domain. You may 10 * use, modify or distribute it freely. 11 * 12 * This code is distributed in the hope that it will be useful but 13 * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY 14 * DISCLAIMED. This includes but is not limited to warranties of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 */ 18 19#ifndef _NTDDBEEP_ 20#define _NTDDBEEP_ 21 22#ifdef __cplusplus 23extern "C" { 24#endif 25 26#define DD_BEEP_DEVICE_NAME "\\Device\\Beep" 27#define DD_BEEP_DEVICE_NAME_U L"\\Device\\Beep" 28#define BEEP_FREQUENCY_MINIMUM 0x25 29#define BEEP_FREQUENCY_MAXIMUM 0x7FFF 30#define IOCTL_BEEP_SET CTL_CODE(FILE_DEVICE_BEEP, 0, METHOD_BUFFERED, FILE_ANY_ACCESS) 31 32typedef struct _BEEP_SET_PARAMETERS 33{ 34 ULONG Frequency; 35 ULONG Duration; 36} BEEP_SET_PARAMETERS, *PBEEP_SET_PARAMETERS; 37 38#ifdef __cplusplus 39} 40#endif 41 42#endif /* _NTDDBEEP_ */ 43 44