form_win - make and break form window and subwindow associations

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

       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.

form_win - make and break form window and subwindow associations

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

       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.

ncurses(3NCURSES), curses_variables(3NCURSES), form(3FORM)

ncurses 6.5                                        2024-12-28                                         win(3FORM)

#include<form.h>intset_form_win(FORM*form,WINDOW*win);WINDOW*form_win(constFORM*form);intset_form_sub(FORM*form,WINDOW*sub);WINDOW*form_sub(constFORM*form);intscale_form(constFORM*form,int*rows,int*columns);