ultrix man page for doupdate

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 contains 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)