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Annotation of ntddk/inc/ntddbeep.h, revision 1.1.1.1

1.1       root        1: /*++ BUILD Version: 0001    // Increment this if a change has global effects
                      2: 
                      3: Copyright (c) 1990-1993  Microsoft Corporation
                      4: 
                      5: Module Name:
                      6: 
                      7:     ntddbeep.h
                      8: 
                      9: Abstract:
                     10: 
                     11:     This is the include file that defines all constants and types for
                     12:     the beep device.
                     13: 
                     14: Author:
                     15: 
                     16:     Lee A. Smith (lees) 02-Aug-1991.
                     17: 
                     18: Revision History:
                     19: 
                     20: --*/
                     21: 
                     22: #ifndef _NTDDBEEP_
                     23: #define _NTDDBEEP_
                     24: 
                     25: //
                     26: // Device Name - this string is the name of the device.  It is the name
                     27: // that should be passed to NtOpenFile when accessing the device.
                     28: //
                     29: // Note:  For devices that support multiple units, it should be suffixed
                     30: //        with the Ascii representation of the unit number.
                     31: //
                     32: 
                     33: #define DD_BEEP_DEVICE_NAME    "\\Device\\Beep"
                     34: #define DD_BEEP_DEVICE_NAME_U L"\\Device\\Beep"
                     35: 
                     36: //
                     37: // NtDeviceIoControlFile IoControlCode values for this device.
                     38: //
                     39: // Warning:  Remember that the low two bits of the code specify how the
                     40: //           buffers are passed to the driver!
                     41: //
                     42: 
                     43: #define IOCTL_BEEP_SET CTL_CODE(FILE_DEVICE_BEEP, 0, METHOD_BUFFERED, FILE_ANY_ACCESS)
                     44: 
                     45: //
                     46: // NtDeviceIoControlFile OutputBuffer record structures for
                     47: // IOCTL_BEEP_SET.
                     48: //
                     49: 
                     50: typedef struct _BEEP_SET_PARAMETERS {
                     51:     ULONG Frequency;
                     52:     ULONG Duration;
                     53: } BEEP_SET_PARAMETERS, *PBEEP_SET_PARAMETERS;
                     54: 
                     55: #define BEEP_FREQUENCY_MINIMUM 0x25
                     56: #define BEEP_FREQUENCY_MAXIMUM 0x7FFF
                     57: 
                     58: #endif // _NTDDBEEP_

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