SysBeep
SysBeep Play a system alert sound
#include <OSUtils.h> Sound Manager
void SysBeep( duration);
short duration; ignored, it used to be used as the duration (in ticks)
of the resulting sound
The SysBeep procedure causes the Sound Manager to play the system alert
sound selected in the Sound control panel.
duration This parameter is no longer used, yet it is still required. It used to
specifiy the duration (in ticks) of the resulting sound and is used
only on a Macintosh Plus, Macintosh SE, or Macintosh Classic when
the system alert sound is the Simple Beep. In all other cases, the
duration parameter is ignored, but you must specify it when you
call this procedure.
Returns: none

Notes: The volume of the sound produced depends on the setting of the current
speaker volume, which the user can adjust in the Sound control panel. If
the speaker volume has been set to 0 (silent) and the system alert sound is
enabled, SysBeep causes the menu bar to blink once.