reactos/include/ddk/ntddbeep.h

   1
   2 #ifndef _NTDDBEEP_
   3 #define _NTDDBEEP_
   4
   5
   6 #ifdef __cplusplus
   7 extern "C" {
   8 #endif
   9
  10 #define DD_BEEP_DEVICE_NAME    "\\Device\\Beep"
  11 #define DD_BEEP_DEVICE_NAME_U  L"\\Device\\Beep"
  12 #define BEEP_FREQUENCY_MINIMUM 0x25
  13 #define BEEP_FREQUENCY_MAXIMUM 0x7FFF
  14 #define IOCTL_BEEP_SET         CTL_CODE(FILE_DEVICE_BEEP, 0, METHOD_BUFFERED, FILE_ANY_ACCESS)
  15
  16 typedef struct _BEEP_SET_PARAMETERS
  17 {
  18    ULONG Frequency;
  19    ULONG Duration;
  20 } BEEP_SET_PARAMETERS, *PBEEP_SET_PARAMETERS;
  21
  22 #ifdef __cplusplus
  23 }
  24 #endif
  25 #endif
  26