DosBeep (OS/2 1.x)

This call generates sound from the speaker.

Syntax

DosBeep (Frequency, Duration)

Parameters

Frequency (USHORT) - input

Tone in Hertz (cycles per second) in the range 37 through 32767.

Duration (USHORT) - input

Length of the sound in milliseconds.

Return Code

rc (USHORT) - return

Return code descriptions are:

• 0 NO_ERROR
• 395 ERROR_INVALID_FREQUENCY

Remarks

DosBeep executes synchronously. An application program that invokes DosBeep waits until the specified number of milliseconds expire before it resumes execution.

Bindings

C

#define INCL_DOSPROCESS

USHORT  rc = DosBeep(Frequency, Duration);

USHORT  Frequency;   /* Hertz (Hz) */
USHORT  Duration;    /* Length of sound */

USHORT  rc;          /* return code */

MASM

EXTRN  DosBeep:FAR
INCL_DOSPROCESS     EQU 1

PUSH   WORD    Frequency   ;Frequency (in Hertz)
PUSH   WORD    Duration    ;Length of sound (in milliseconds)
CALL   DosBeep

Returns WORD

Example Code

This example generates a beep for 1 second (1,000 milliseconds) at a frequency of 1,380.

#define INCL_DOSPROCESS
#define BEEP_FREQUENCY 1380
#define BEEP_DURATION 1000

 USHORT  rc;

 rc = DosBeep(BEEP_FREQUENCY,
              BEEP_DURATION);