42 lines
788 B
C
42 lines
788 B
C
/*++ BUILD Version: 0001 // Increment this if a change has global effects
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Copyright (c) 1990-1993 Microsoft Corporation
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Module Name:
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ntddsnd.h
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Abstract:
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This is the include file that defines all the common
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constants and types for sound devices.
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Author:
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Nigel Thompson (NigelT) 17-May-91
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Revision History:
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--*/
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#ifndef _NTDDSND_
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#define _NTDDSND_
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//
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// Define the IOCTL base values for sound devices and each class
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// of sound device
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//
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#define IOCTL_SOUND_BASE FILE_DEVICE_SOUND
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#define IOCTL_WAVE_BASE 0x0000
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#define IOCTL_MIDI_BASE 0x0080
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//
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// Define some useful limits
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//
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#define SOUND_MAX_DEVICE_NAME 80 // BUGBUG this is a wild guess
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#define SOUND_MAX_DEVICES 100 // Max no of devices of a given type
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#endif // _NTDDSND_
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