DosBeep: Difference between revisions
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==DosBeep== | ==DosBeep== | ||
To produce a beep from the speaker DosBeep is called with the frequency and the length of the beep as arguments. | |||
===Syntax=== | ===Syntax=== | ||
rc = DosBeep( ''ulFrequency'', ''ulDuration'' ); | rc = DosBeep( ''ulFrequency'', ''ulDuration'' ); | ||
===Parameters=== | ===Parameters=== | ||
; ULONG ''ulFrequency'' (input) | ; ULONG ''ulFrequency'' (input) | ||
: The frequency in Hertz (Hz) of the beep to be generated. In the range of 0x25 to 0x7FFF (37 to 32767). | : The frequency in Hertz (Hz) of the beep to be generated. In the range of 0x25 to 0x7FFF (37 to 32767). | ||
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===Returns=== | ===Returns=== | ||
APIRET rc | APIRET rc | ||
0 NO_ERROR | 0 NO_ERROR | ||
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===Include Info=== | ===Include Info=== | ||
#define INCL_DOSPROCESS | #define INCL_DOSPROCESS | ||
#include <os2.h> | #include <os2.h> | ||
===Sample Code=== | ===Sample Code=== | ||
#define INCL_DOSPROCESS | #define INCL_DOSPROCESS | ||
#include <os2.h> | #include <os2.h> | ||
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===See Also=== | ===See Also=== | ||
* [[DosDevConfig]] | |||
* [[DosDevIOCtl]] | |||
* [[DosPhysicalDisk]] | |||
[[Category:Dos]] | |||
[[Category: | |||
Revision as of 22:34, 10 November 2016
DosBeep
To produce a beep from the speaker DosBeep is called with the frequency and the length of the beep as arguments.
Syntax
rc = DosBeep( ulFrequency, ulDuration );
Parameters
- ULONG ulFrequency (input)
- The frequency in Hertz (Hz) of the beep to be generated. In the range of 0x25 to 0x7FFF (37 to 32767).
- ULONG ulDuration (input)
- The duration of the beep to be generated. In milliseconds.
Returns
APIRET rc 0 NO_ERROR 395 ERROR_INVALID_FREQUENCY
Include Info
#define INCL_DOSPROCESS #include <os2.h>
Sample Code
#define INCL_DOSPROCESS
#include <os2.h>
#include <stdio.h> /* For printf */
if(DosBeep(400, 300)) /* Beep a 400 Hz tone for 0.3 seconds */
{
printf("Invalid frequency to DosBeep()\n"); /* In case of error, should not */
} /* be called now when the */
/* frequency is 400 Hz */