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form(3X)							      form(3X)

NAME
       form - curses extension for programming forms

SYNOPSIS
       #include <form.h>

DESCRIPTION
       The form library provides terminal-independent facilities for composing
       form screens on character-cell terminals.  The library includes:	 field
       routines, which create and modify form fields; and form routines, which
       group fields into forms, display forms on the screen, and handle inter‐
       action with the user.

       The  form  library uses the curses libraries.  To use the form library,
       link with the options -lform -lcurses.

       Your program should set up the locale, e.g.,

	    setlocale(LC_ALL, "");

       so that input/output processing will work.

       A curses initialization routine such as initscr must be	called	before
       using any of these functions.

   Current Default Values for Field Attributes
       The  form  library maintains a default value for field attributes.  You
       can get or  set	this  default  by  calling  the	 appropriate  set_  or
       retrieval  routine  with	 a  NULL field pointer.	 Changing this default
       with a set_ function affects  future  field  creations,	but  does  not
       change the rendering of fields already created.

   Routine Name Index
       The  following table lists each form routine and the name of the manual
       page on which it is described.

RETURN VALUE
       Routines that return pointers return NULL on error, and	set  errno  to
       the  corresponding  error-code returned by functions returning an inte‐
       ger.  Routines that return an integer return one of the following error
       codes:

       E_OK The routine succeeded.

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

       E_BAD_STATE
	    Routine was called from an initialization or termination function.

       E_CONNECTED
	    The field is already connected to a form.

       E_INVALID_FIELD
	    Contents of a field are not valid.

       E_NOT_CONNECTED
	    No fields are connected to the form.

       E_NOT_POSTED
	    The form has not been posted.

       E_NO_ROOM
	    Form is too large for its window.

       E_POSTED
	    The form is already posted.

       E_REQUEST_DENIED
	    The form driver could not process the request.

       E_SYSTEM_ERROR
	    System error occurred (see errno).

       E_UNKNOWN_COMMAND
	    The form driver code saw an unknown request code.

SEE ALSO
       curses(3X)  and	related	 pages	whose names begin "form_" for detailed
       descriptions of the entry points.

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

       In your library list, libform.a should be before libncurses.a; that is,
       you want to say `-lform -lncurses', not the  other  way	around	(which
       would give you a link error using most linkers).

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

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

SEE ALSO
       This describes ncurses version 5.7 (patch 20081102).

								      form(3X)
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