.\"***************************************************************************
-.\" Copyright (c) 2002-2017,2018 Free Software Foundation, Inc. *
+.\" Copyright 2018,2020 Thomas E. Dickey *
+.\" Copyright 2002-2015,2017 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: curs_bkgrnd.3x,v 1.9 2018/07/28 21:34:06 tom Exp $
+.\" $Id: curs_bkgrnd.3x,v 1.11 2020/02/02 23:34:34 tom Exp $
.de bP
.ie n .IP \(bu 4
.el .IP \(bu 2
\fBbkgrndset\fR, and
\fBgetbkgrnd\fR
may be macros.
+.PP
+X/Open Curses does not provide details on how the rendition is changed.
+This implementation follows the approach used in SVr4 curses,
+which is explained in the manual page for \fBwbkgd\fP.
.SH RETURN VALUE
.PP
The \fBbkgrndset\fR and \fBwbkgrndset\fR routines do not return a value.
A null window pointer is treated as an error.
.bP
A null character pointer is treated as an error.
+.SH PORTABILITY
+.PP
+These functions are described in the XSI Curses standard, Issue 4
+(X/Open Curses).
.SH SEE ALSO
\fBcurses\fR(3X),
\fBcurs_bkgd\fR(3X)