+ <STRONG>o</STRONG> If the cell uses color, and its background color does not match
+ that of the current window background, <EM>ncurses</EM> updates only the
+ non-color attributes, first removing those that may have come from
+ the current background, and then adding attributes from the new
+ background.
+
+ <EM>ncurses</EM> treats a background character value of zero (0) as a blank
+ character.
+
+ If the terminal does not support color, or if color has not been
+ initialized with <STRONG><A HREF="curs_color.3x.html">start_color(3x)</A></STRONG>, <EM>ncurses</EM> ignores the new background
+ character's color attribute.
+
+
+</PRE><H3><a name="h3-bkgrndset_wbkgrndset">bkgrndset, wbkgrndset</a></H3><PRE>
+ <STRONG>bkgrndset</STRONG> and <STRONG>wbkgrndset</STRONG> manipulate the background of the applicable
+ window, without updating the character cells as <STRONG>bkgrnd</STRONG> and <STRONG>wbkgrnd</STRONG> do;
+ only future writes reflect the updated background.
+
+
+</PRE><H3><a name="h3-getbkgrnd_wgetbkgrnd">getbkgrnd, wgetbkgrnd</a></H3><PRE>
+ The <STRONG>getbkgrnd</STRONG> and <STRONG>wgetbkgrnd</STRONG> functions obtain the background character
+ and attribute pair of <STRONG>stdscr</STRONG> or the specified window and store it via
+ the <EM>wch</EM> pointer.
+
+
+</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
+ <STRONG>bkgrndset</STRONG> and <STRONG>wbkgrndset</STRONG> do not return a value.
+
+ The other functions return <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> upon success. In
+ <EM>ncurses</EM>, failure occurs if
+
+ <STRONG>o</STRONG> a <EM>WINDOW</EM> pointer <EM>win</EM> is null, or
+
+ <STRONG>o</STRONG> a <EM>cchar</EM><STRONG>_</STRONG><EM>t</EM> pointer <EM>wch</EM> is null.
+
+
+</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
+ <STRONG>bkgrnd</STRONG>, <STRONG>bkgrndset</STRONG>, and <STRONG>getbkgrnd</STRONG> may be implemented as macros.
+
+ Unlike their counterparts in the non-"wide" configuration of <EM>ncurses</EM>,
+ <STRONG>getbkgrnd</STRONG> and <STRONG>wgetbkgrnd</STRONG> supply the background character and attribute
+ in a modifiable <EM>cchar</EM><STRONG>_</STRONG><EM>t</EM> parameter, not as the return value.
+
+
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+ X/Open Curses, Issue 4 describes these functions. It specifies no
+ error conditions for them.
+
+ X/Open Curses does not provide details of how the rendition is updated.
+ This implementation follows the approach used in SVr4 <EM>curses</EM>.
+
+
+</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+ <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG> describes the corresponding functions in the non-"wide"
+ configuration of <EM>ncurses</EM>.
+
+ <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_add_wch.3x.html">curs_add_wch(3x)</A></STRONG>, <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>