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

## SYNOPSIS

           #include
           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.   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).

           The header file  automatically includes the header
           file .

## 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.