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 23 #ifdef __cplusplus 24 extern "C" { 25 #endif 26 27 #define DD_BEEP_DEVICE_NAME "\\Device\\Beep" 28 #define DD_BEEP_DEVICE_NAME_U L"\\Device\\Beep" 29 #define BEEP_FREQUENCY_MINIMUM 0x25 30 #define BEEP_FREQUENCY_MAXIMUM 0x7FFF 31 #define IOCTL_BEEP_SET CTL_CODE(FILE_DEVICE_BEEP, 0, METHOD_BUFFERED, FILE_ANY_ACCESS) 32 33 typedef struct _BEEP_SET_PARAMETERS 34 { 35 ULONG Frequency; 36 ULONG Duration; 37 } BEEP_SET_PARAMETERS, *PBEEP_SET_PARAMETERS; 38 39 #ifdef __cplusplus 40 } 41 #endif 42 #endif 43 44