beep, flash - curses bell and screen flash routines
        #include <curses.h>
       int beep(void);
       int flash(void);
       The  beep  and flash routines are used to alert the terminal user.  The
       routine beep sounds an audible alarm on the terminal, if possible; otherwise
 it flashes the screen (visible bell).  The routine flash flashes
       the screen, and if that is not possible, sounds the alert.  If  neither
       alert is possible, nothing happens.  Nearly all terminals have an audible
 alert (bell or beep), but only some can flash the screen.
       These routines return OK if they succeed in beeping  or	flashing,  ERR
       otherwise.
       SVr4's beep and flash routines always returned OK, so it was not possible
 to tell when the beep or flash failed.
        These functions are defined in the XSI Curses standard, Issue 4.   Like
       SVr4, it specifies that they always return OK.
       curses(3X)
								 curs_beep(3X)
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