reactos/include/ddk/ntddbeep.h

   1 #ifndef _BEEP_H_INCLUDED_
   2 #define _BEEP_H_INCLUDED_
   3
   4 #define IOCTL_BEEP_SET  CTL_CODE(FILE_DEVICE_BEEP,0,METHOD_BUFFERED,FILE_ANY_ACCESS)
   5
   6 typedef struct tagBEEP_SET_PARAMETERS
   7 {
   8     ULONG Frequency;
   9     ULONG Duration;
  10 } BEEP_SET_PARAMETERS, *PBEEP_SET_PARAMETERS;
  11
  12 #define BEEP_FREQUENCY_MINIMUM  0x25
  13 #define BEEP_FREQUENCY_MAXIMUM  0x7FFF
  14
  15 #endif /* _BEEP_H_INCLUDED_ */