1 files changed, 41 insertions, 0 deletions
diff --git a/public/sdk/inc/ntddsnd.h b/public/sdk/inc/ntddsnd.h
new file mode 100644
index 000000000..b3ad9884d
--- /dev/null
+++ b/public/sdk/inc/ntddsnd.h
@@ -0,0 +1,41 @@
+/*++ BUILD Version: 0001    // Increment this if a change has global effects
+
+Copyright (c) 1990-1993  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_
+
+//
+// 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
+#endif // _NTDDSND_
+