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<H1 class="no-header">curs_border 3x 2025-10-20 ncurses 6.6 Library calls</H1>
<PRE>
<STRONG><A HREF="curs_border.3x.html">curs_border(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_border.3x.html">curs_border(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>border</STRONG>, <STRONG>wborder</STRONG>, <STRONG>box</STRONG>, <STRONG>hline</STRONG>, <STRONG>whline</STRONG>, <STRONG>vline</STRONG>, <STRONG>wvline</STRONG>, <STRONG>mvhline</STRONG>, <STRONG>mvwhline</STRONG>,
<STRONG>mvvline</STRONG>, <STRONG>mvwvline</STRONG> - draw borders and lines in a <EM>curses</EM> window of
characters
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>border(chtype</STRONG> <EM>ls</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>rs</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ts</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>bs</EM><STRONG>,</STRONG>
<STRONG>chtype</STRONG> <EM>tl</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>tr</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>bl</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>br</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>wborder(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ls</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>rs</EM><STRONG>,</STRONG>
<STRONG>chtype</STRONG> <EM>ts</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>bs</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>tl</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>tr</EM><STRONG>,</STRONG>
<STRONG>chtype</STRONG> <EM>bl</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>br</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>box(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>verch</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>horch</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>hline(chtype</STRONG> <EM>ch</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>whline(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>mvhline(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>mvwhline(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>vline(chtype</STRONG> <EM>ch</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>wvline(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>mvvline(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>mvwvline(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
<STRONG>wborder</STRONG> and <STRONG>border</STRONG> draw a box at the edges of the specified window or
<STRONG>stdscr</STRONG>, respectively. Each <EM>chtype</EM> argument corresponds to a geometric
component of the border as follows:
<EM>ls</EM> - left side,
<EM>rs</EM> - right side,
<EM>ts</EM> - top side,
<EM>bs</EM> - bottom side,
<EM>tl</EM> - top left-hand corner,
<EM>tr</EM> - top right-hand corner,
<EM>bl</EM> - bottom left-hand corner, and
<EM>br</EM> - bottom right-hand corner.
If any <EM>chtype</EM> argument is <STRONG>0</STRONG>, then <EM>curses</EM> uses forms-drawing characters
(see <STRONG><A HREF="curs_addch.3x.html">addch(3x)</A></STRONG>) in the following correspondence:
<STRONG>ACS_VLINE</STRONG>,
<STRONG>ACS_VLINE</STRONG>,
<STRONG>ACS_HLINE</STRONG>,
<STRONG>ACS_HLINE</STRONG>,
<STRONG>ACS_ULCORNER</STRONG>,
<STRONG>ACS_URCORNER</STRONG>,
<STRONG>ACS_LLCORNER</STRONG>, and
<STRONG>ACS_LRCORNER</STRONG>.
<STRONG>box(</STRONG><EM>win</EM><STRONG>,</STRONG> <EM>verch</EM><STRONG>,</STRONG> <EM>horch</EM><STRONG>)</STRONG> is shorthand for "<STRONG>wborder(</STRONG><EM>win</EM><STRONG>,</STRONG> <EM>verch</EM><STRONG>,</STRONG> <EM>verch</EM><STRONG>,</STRONG>
<EM>horch</EM><STRONG>,</STRONG> <EM>horch</EM><STRONG>,</STRONG> <STRONG>0,</STRONG> <STRONG>0,</STRONG> <STRONG>0,</STRONG> <STRONG>0)</STRONG>".
<STRONG>whline</STRONG> draws a horizontal line of <EM>ch</EM> from left to right, and <STRONG>wvline</STRONG> a
vertical one from top to bottom, stopping once <EM>n</EM> characters have been
drawn or upon reaching the boundary of <EM>win</EM>. These functions do not
update the cursor position (beyond any motion directed by their "mv"
variants). <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG> describes the variants of these functions.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
These functions return <STRONG>OK</STRONG> on success and <STRONG>ERR</STRONG> on failure.
In <EM>ncurses</EM>,
<STRONG>o</STRONG> these functions fail if the screen is not initialized; and
<STRONG>o</STRONG> functions taking a <EM>WINDOW</EM> pointer argument fail if <EM>win</EM> is a null
pointer.
Functions prefixed with "mv" first perform cursor movement and fail if
the position (<EM>y</EM>, <EM>x</EM>) is outside the window boundaries.
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
Unusually, there is no <STRONG>wbox</STRONG> function; <STRONG>box</STRONG> behaves as one would expect
<STRONG>wbox</STRONG> to, accepting a <EM>WINDOW</EM> pointer argument.
<STRONG>border</STRONG>, <STRONG>box</STRONG>, <STRONG>hline</STRONG>, <STRONG>mvhline</STRONG>, <STRONG>mvwhline</STRONG>, <STRONG>vline</STRONG>, <STRONG>mvvline</STRONG>, and <STRONG>mvwvline</STRONG> may
be implemented as macros.
Borders drawn by these functions are <EM>interior</EM> borders.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
These functions are described in X/Open Curses Issue 4. It specifies
no error conditions for them.
SVr4 documentation says that these functions return <EM>OK</EM> "or a non-
negative integer if <EM>immedok()</EM> is set", referring to the return value
from <EM>wrefresh</EM>, which in SVr4 returns a count of characters written to
the window if its <EM>immedok</EM> property is set; in <EM>ncurses</EM>, it does not.
BSD <EM>curses</EM> drew boxes with <EM>horch</EM> in <EM>every</EM> character cell of the top and
bottom lines of the window, whereas SVr3.1 and later <EM>curses</EM>, because
its <EM>box</EM> wrapped <EM>wborder</EM>, used the default corner characters.
</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
4BSD (1980) introduced <EM>box</EM>, defining it as a function.
SVr3.1 (1987) added <EM>whline</EM> and <EM>wvline</EM> and their variants, as well as
<EM>border</EM> and <EM>wborder</EM>, redefining <EM>box</EM> as a macro wrapping the latter.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>
ncurses 6.6 2025-10-20 <STRONG><A HREF="curs_border.3x.html">curs_border(3x)</A></STRONG>
</PRE>
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<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-HISTORY">HISTORY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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