Inside Macintosh: Sound /

Chapter 2 - Sound Manager / Sound Manager Reference

Sound Manager Routines / Controlling Volume Levels

GetSysBeepVolume

You can use the GetSysBeepVolume function to determine the current volume of the system alert sound.

FUNCTION GetSysBeepVolume (VAR level: LongInt): OSErr;

level

On exit, the current volume level of the system alert sound.

DESCRIPTION

The GetSysBeepVolume function returns, in the level parameter, the current volume level of the system alert sound. The values returned in the high and low words of the level parameter range from 0 (silence) to $0100 (full volume).

SPECIAL CONSIDERATIONS

The GetSysBeepVolume function is available only in versions 3.0 and later of the Sound Manager. You can call this function at interrupt time.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for the GetSysBeepVolume function are

Trap macro	Selector
_SoundDispatch	$02240024

RESULT CODES

noErr

0

No error