form_win(3X)                                         form_win(3X)

NAME
       form_win  - make and break form window and subwindow asso-
       ciations

SYNOPSIS
       #include <form.h>
       int set_form_win(FORM *form, WINDOW *win);
       WINDOW *form_win(const FORM *form);
       int set_form_sub(FORM *form, WINDOW *sub);
       WINDOW *form_sub(const FORM *form);
       int scale_form(const FORM *form, int *rows, int *columns);

DESCRIPTION
       Every  form has an associated pair of curses windows.  The
       form window displays any title and border associated  with
       the  window;  the form subwindow displays the items of the
       form that are currently available for selection.

       The first four functions get and set those windows.  It is
       not necessary to set either window; by default, the driver
       code uses stdscr for both.

       In the set_ functions, window argument of NULL is  treated
       as  though  it  were  stsdcr.   A form argument of NULL is
       treated as a request to change  the  system  default  form
       window or subwindow.

       The   function   scale_window  returns  the  minimum  size
       required for the subwindow of form.

RETURN VALUE
       Routines that return pointers return NULL on error.   Rou-
       tines  that  return an integer return one of the following
       error codes:

       E_OK The routine succeeded.

       E_SYSTEM_ERROR
            System error occurred (see errno).

       E_BAD_ARGUMENT
            Routine detected an incorrect or  out-of-range  argu-
            ment.

       E_POSTED
            The form has already been posted.

       E_NOT_CONNECTED
            No items are connected to the form.

SEE ALSO
       curses(3X), form(3X).

NOTES
       The header file <form.h> automatically includes the header
       file <curses.h>.

PORTABILITY
       These routines emulate the System V forms  library.   They
       were not supported on Version 7 or BSD versions.

AUTHORS
       Juergen  Pfeifer.   Manual  pages  and  adaptation for new
       curses by Eric S. Raymond.

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