DosBeep

This call generates sound from the speaker.

  DosBeep (Frequency, Duration)

• Frequency (USHORT) - input : Tone in Hertz (cycles per second) in the range 37 through 32767.
• Duration (USHORT) - input : Length of the sound in milliseconds.

rc (USHORT) - return Return code descriptions are:

• 0 NO_ERROR
• 395 ERROR_INVALID_FREQUENCY

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

#define INCL_DOSPROCESS
 
USHORT  rc = DosBeep(Frequency, Duration);
 
USHORT  Frequency;     /* Hertz (Hz) */
USHORT  Duration;      /* Length of sound */
 
USHORT  rc;            /* return code */

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

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);

Text based on http://www.edm2.com/index.php/OS2_API:CPI:LEGACY:DosBeep