50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
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/*
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* ntddbeep.h Beep device I/O control codes
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*
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* =========================================================================
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*
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* Open Watcom Project
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*
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* Copyright (c) 2004-2010 The Open Watcom Contributors. All Rights Reserved.
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*
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* This file is automatically generated. Do not edit directly.
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*
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* =========================================================================
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*/
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#ifndef _NTDDBEEP_
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#define _NTDDBEEP_
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#ifndef _ENABLE_AUTODEPEND
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#pragma read_only_file;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Beep device name */
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#define DD_BEEP_DEVICE_NAME "\\Device\\Beep"
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#define DD_BEEP_DEVICE_NAME_U L"\\Device\\Beep"
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/* Beep device I/O control codes */
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#define IOCTL_BEEP_SET \
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CTL_CODE( FILE_DEVICE_BEEP, 0, METHOD_BUFFERED, FILE_ANY_ACCESS )
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/* Beep frequency special values */
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#define BEEP_FREQUENCY_MINIMUM 0x0025
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#define BEEP_FREQUENCY_MAXIMUM 0x7FFF
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/* Beep set parameters */
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typedef struct _BEEP_SET_PARAMETERS {
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ULONG Frequency;
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ULONG Duration;
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} BEEP_SET_PARAMETERS;
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typedef BEEP_SET_PARAMETERS *PBEEP_SET_PARAMETERS;
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* _NTDDBEEP_ */
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