dft_fgbg man page on Ultrix

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use_default_colors(3X)					use_default_colors(3X)

       dft_fgbg - use terminal's default colors

       #include <curses.h>

       int use_default_colors(void);

       This  is an extension to the curses library.  It is used with terminals
       that support ISO 6429 color, or equivalent.  These terminals allow  the
       application  to reset color to an unspecified default value (e.g., with
       SGR 39 or SGR 49).  Because they are designed to	 support  this,	 their
       design  usually	includes  features to change the default foreground or
       background colors so that they do  not  match  the  assumption  in  XSI
       curses of white on black.

       Applications  that paint a colored background over the whole screen are
       not adversely impacted by this type of terminal design.	However, there
       are applications that are designed to work with the default background.

       The  function  returns  the integer ERR upon failure and OK on success.
       It will fail if either the terminal does not support the	 orig_pair  or
       orig_colors  capability.	  If  the initialize_pair capability is found,
       this causes an error as well.

       Associated with this extension, the init_pair(3X) function accepts neg‐
       ative arguments to specify default foreground or background colors.

       These  routines	are  specific  to ncurses.  They were not supported on
       Version 7, BSD or System V implementations.  It is recommended that any
       code depending on them be conditioned using NCURSES_VERSION.

       curs_color(3X), ded(1).

       Thomas Dickey (from an analysis of the requirements for color xterm for
       XFree86 3.1.2C, February 1996).


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