border, wborder, box, hline, whline, vline, wvline, mvhline, mvwhline,
   mvvline, mvwvline - create curses borders, horizontal and vertical


   #include <curses.h>
   int border(chtype ls, chtype rs, chtype ts, chtype bs,
      chtype tl, chtype tr, chtype bl, chtype br);
   int wborder(WINDOW *win, chtype ls, chtype rs,
      chtype ts, chtype bs, chtype tl, chtype tr,
      chtype bl, chtype br);
   int box(WINDOW *win, chtype verch, chtype horch);
   int hline(chtype ch, int n);
   int whline(WINDOW *win, chtype ch, int n);
   int vline(chtype ch, int n);
   int wvline(WINDOW *win, chtype ch, int n);
   int mvhline(int y, int x, chtype ch, int n);
   int mvwhline(WINDOW *, int y, int x, chtype ch, int n);
   int mvvline(int y, int x, chtype ch, int n);
   int mvwvline(WINDOW *, int y, int x, chtype ch, int n);


   The  border,  wborder and box routines draw a box around the edges of a
   window.  Other than the window,  each  argument  is  a  character  with

          ls - left side,
          rs - right side,
          ts - top side,
          bs - bottom side,
          tl - top left-hand corner,
          tr - top right-hand corner,
          bl - bottom left-hand corner, and
          br - bottom right-hand corner.

   If  any  of  these  arguments  is  zero, then the corresponding default
   values (defined in curses.h) are used instead:


   box(win,  verch,  horch)  is  a  shorthand  for  the  following   call:
   wborder(win, verch, verch, horch, horch, 0, 0, 0, 0).

   The  hline  and whline functions draw a horizontal (left to right) line
   using ch starting at the current cursor position in  the  window.   The
   current  cursor  position  is  not  changed.   The  line  is  at most n
   characters long, or as many as fit into the window.

   The vline and wvline functions draw a vertical  (top  to  bottom)  line
   using  ch  starting  at the current cursor position in the window.  The
   current cursor position  is  not  changed.   The  line  is  at  most  n
   characters long, or as many as fit into the window.


   All  routines return the integer OK.  The SVr4.0 manual says "or a non-
   negative integer if immedok is set", but this appears to be an error.

   X/Open does not  define  any  error  conditions.   This  implementation
   returns an error if the window pointer is null.

   Functions  with  a  "mv"  prefix  first perform a cursor movement using
   wmove, and return an error if the position is outside the window, or if
   the window pointer is null.


   The  borders  generated  by these functions are inside borders (this is
   also true of SVr4 curses, though the fact is not documented).

   Note that border and box may be macros.


   These functions are described in the XSI Curses standard, Issue 4.  The
   standard  specifies  that  they return ERR on failure, but specifies no
   error conditions.


   ncurses(3NCURSES), outopts(3NCURSES).


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