1 /*

     2  * ntddbeep.h

     3  *

     4  * Beep device IOCTL interface

     5  *

     6  * This file is part of the w32api package.

     7  *

     8  * Contributors:

     9  *   Created by Casper S. Hornstrup <chorns@users.sourceforge.net>

    10  *

    11  * THIS SOFTWARE IS NOT COPYRIGHTED

    12  *

    13  * This source code is offered for use in the public domain. You may

    14  * use, modify or distribute it freely.

    15  *

    16  * This code is distributed in the hope that it will be useful but

    17  * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY

    18  * DISCLAIMED. This includes but is not limited to warranties of

    19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

    20  *

    21  */

    22 

    23 #ifndef __NTDDBEEP_H

    24 #define __NTDDBEEP_H

    25 

    26 #if __GNUC__ >=3

    27 #pragma GCC system_header

    28 #endif

    29 

    30 #ifdef __cplusplus

    31 extern "C" {

    32 #endif

    33 

    34 #include "ntddk.h"

    35 

    36 #define DD_BEEP_DEVICE_NAME               "\\Device\\Beep"

    37 #define DD_BEEP_DEVICE_NAME_U             L"\\Device\\Beep"

    38 

    39 #define IOCTL_BEEP_SET \

    40   CTL_CODE(FILE_DEVICE_BEEP, 0, METHOD_BUFFERED, FILE_ANY_ACCESS)

    41 

    42 typedef struct _BEEP_SET_PARAMETERS {

    43 	ULONG  Frequency;

    44 	ULONG  Duration;

    45 } BEEP_SET_PARAMETERS, *PBEEP_SET_PARAMETERS;

    46 

    47 #define BEEP_FREQUENCY_MINIMUM            0x25

    48 #define BEEP_FREQUENCY_MAXIMUM            0x7FFF

    49 

    50 #ifdef __cplusplus

    51 }

    52 #endif

    53 

    54 #endif /* __NTDDBEEP_H */