DosBeep (OS/2 1.x)

This is the legacy function, please visit DosBeep for the current version.

Description

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.

Example Code

C Binding

#define INCL_DOSPROCESS

USHORT  rc = DosBeep(Frequency, Duration);

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

USHORT           rc;            /* return 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);

MASM Binding

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