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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, and a curses initialization
       routine such as initscr must be called before using any of these	 func‐
       tions.  To use the form library, link with the options -lform -lcurses.

   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	get_  or  set_
       routine	with  a NULL field pointer.  Changing this default with a set_
       function affects future field creations, but does not change  the  ren‐
       dering 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.

       curses Routine Name    Manual Page Name
       ─────────────────────────────────────────────────
       current_field	      form_page(3X)
       data_ahead	      form_data(3X)
       data_behind	      form_data(3X)
       dup_field	      form_field_new(3X)
       dynamic_fieldinfo      form_field_info(3X)
       field_arg	      form_field_validation(3X)
       field_back	      form_field_attributes(3X)
       field_buffer	      form_field_buffer(3X)
       field_count	      form_field(3X)
       field_fore	      form_field_attributes(3X)
       field_index	      form_page(3X)
       field_info	      form_field_info(3X)
       field_init	      form_hook(3X)
       field_just	      form_field_just(3X)
       field_opts	      form_field_opts(3X)
       field_opts_off	      form_field_opts(3X)
       field_opts_on	      form_field_opts(3X)
       field_pad	      form_field_attributes(3X)
       field_status	      form_field_buffer(3X)
       field_term	      form_hook(3X)
       field_type	      form_field_validation(3X)
       field_userptr	      form_field_userptr(3X)
       form_driver	      form_driver(3X)
       form_fields	      form_field(3X)
       form_init	      form_hook(3X)
       form_opts	      form_opts(3X)
       form_opts_off	      form_opts(3X)
       form_opts_on	      form_opts(3X)

       form_page	      form_page(3X)
       form_request_by_name   form_requestname(3X)
       form_request_name      form_requestname(3X)
       form_sub		      form_win(3X)
       form_term	      form_hook(3X)
       form_userptr	      form_userptr(3X)
       form_win		      form_win(3X)
       free_field	      form_field_new(3X)
       free_form	      form_new(3X)
       link_field	      form_field_new(3X)
       link_fieldtype	      form_fieldtype(3X)
       move_field	      form_field(3X)
       new_field	      form_field_new(3X)
       new_form		      form_new(3X)
       new_page		      form_new_page(3X)
       pos_form_cursor	      form_cursor(3X)
       post_form	      form_post(3X)
       scale_form	      form_win(3X)
       set_current_field      form_page(3X)
       set_field_back	      form_field_attributes(3X)
       set_field_buffer	      form_field_buffer(3X)
       set_field_fore	      form_field_attributes(3X)
       set_field_init	      form_hook(3X)
       set_field_just	      form_field_just(3X)
       set_field_opts	      form_field_opts(3X)
       set_field_pad	      form_field_attributes(3X)
       set_field_status	      form_field_buffer(3X)
       set_field_term	      form_hook(3X)
       set_field_type	      form_field_validation(3X)
       set_field_userptr      form_field_userptr(3X)
       set_fieldtype_arg      form_fieldtype(3X)
       set_fieldtype_choice   form_fieldtype(3X)
       set_form_fields	      form_field(3X)
       set_form_init	      form_hook(3X)
       set_form_opts	      form_field_opts(3X)
       set_form_page	      form_page(3X)
       set_form_sub	      form_win(3X)
       set_form_term	      form_hook(3X)
       set_form_userptr	      form_userptr(3X)
       set_form_win	      form_win(3X)
       set_max_field	      form_field_buffer(3X)
       set_new_page	      form_new_page(3X)
       unpost_form	      form_post(3X)

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_CONNECTED
	    The field is already connected to a form.

       E_SYSTEM_ERROR
	    System error occurred (see errno).

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

       E_POSTED
	    The form is already posted.

       E_BAD_STATE
	    Routine was called from an initialization or termination function.

       E_NO_ROOM
	    Form is too large for its window.

       E_NOT_POSTED
	    The form has not been posted.

       E_UNKNOWN_COMMAND
	    The form driver code saw an unknown request code.

       E_INVALID_FIELD
	    Contents of a field are not valid.

       E_NOT_CONNECTED
	    No fields are connected to the form.

       E_REQUEST_DENIED
	    The form driver could not process the request.

SEE ALSO
       curses(3X) and 3X pages whose names begin "form_" for detailed descrip‐
       tions 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 GNU ld(1) and many other 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.

								      form(3X)
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