# form_win 3x 2023-11-25 ncurses 6.4 Library calls

    form_win(3x)                     Library calls                    form_win(3x)

## NAME

           form_win - make and break form window and subwindow associations

## 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_form returns  the  minimum  size  required  for  the
           subwindow of form.

## RETURN VALUE

           Routines  that  return  pointers  return  NULL on error.  Routines that
           return an integer return one of the following error codes:

           E_OK The routine succeeded.

           E_SYSTEM_ERROR
                System error occurred (see errno(3)).

           E_BAD_ARGUMENT
                Routine detected an incorrect or out-of-range argument.

           E_POSTED
                The form has already been posted.

           E_NOT_CONNECTED
                No items are connected to the form.

## 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.

## SEE ALSO

           curses(3x), curs_variables(3x), form(3x)

    ncurses 6.4                       2023-11-25                      form_win(3x)