Source code of Windows XP (NT5)
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/*++ BUILD Version: 0001 // Increment this if a change has global effects
Copyright (c) 1990-1999 Microsoft Corporation
Module Name:
ntddsnd.h
Abstract:
This is the include file that defines all the common constants and types for sound devices.
Author:
Nigel Thompson (NigelT) 17-May-91
Revision History:
--*/
#ifndef _NTDDSND_
#define _NTDDSND_
#if _MSC_VER > 1000
#pragma once
#endif
#ifdef __cplusplus
extern "C" {#endif
//
// Define the IOCTL base values for sound devices and each class
// of sound device
//
#define IOCTL_SOUND_BASE FILE_DEVICE_SOUND
#define IOCTL_WAVE_BASE 0x0000
#define IOCTL_MIDI_BASE 0x0080
//
// Define some useful limits
//
#define SOUND_MAX_DEVICE_NAME 80 // BUGBUG this is a wild guess
#define SOUND_MAX_DEVICES 100 // Max no of devices of a given type
#ifdef __cplusplus
}#endif
#endif // _NTDDSND_
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