doupdate man page on Ultrix

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wnoutrefresh(3cur)					    wnoutrefresh(3cur)

Name
       wnoutrefresh, doupdate - do efficient refresh

Syntax
       #include <cursesX.h>

       int wnoutrefresh(win)
       WINDOW ∗win;

       int doupdate()

Description
       The  routine updates screens more efficiently than using the routine by
       itself.	The routine copies  the	 named	window	to  a  data  structure
       referred	 to  as	 the virtual screen (stdscr).  The virtual screen con‐
       tains what a program  intends  to  display  on  the  physical  terminal
       screen.	The routine compares the virtual screen to the physical screen
       and then does the actual update.	 These	two  routines  allow  multiple
       updates with more efficiency than

       The  routine works by calling and then calling If a programmer wants to
       output several windows at once, a series of calls  to  will  result  in
       alternating  calls  to  and  causing  several  bursts  of output to the
       screen.	If is called first for each window, only needs	to  be	called
       once,  resulting	 in only one burst of output.  This usually results in
       fewer total characters being transmitted and less CPU time used.

Return Values
       The and functions return OK on success and ERR on error.

See Also
       wrefresh(3cur)

							    wnoutrefresh(3cur)
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