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.\"	$NetBSD: form_opts.3,v 1.10 2010/03/22 21:58:31 joerg Exp $
.\"
.\" Copyright (c) 2001
.\"	Brett Lymn - blymn@baea.com.au, brett_lymn@yahoo.com.au
.\"
.\" This code is donated to The NetBSD Foundation by the author.
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.Dd January 1, 2001
.Dt FORMS 3
.Os
.Sh NAME
.Nm form_opts ,
.Nm form_opts_off ,
.Nm form_opts_on ,
.Nm set_form_opts
.Nd form library
.Sh LIBRARY
.Lb libform
.Sh SYNOPSIS
.In form.h
.Ft Form_Options
.Fn form_opts "FORM *form"
.Ft int
.Fn form_opts_off "FORM *form" "Form_Options options"
.Ft int
.Fn form_opts_on "FORM *form" "Form_Options options"
.Ft int
.Fn set_form_opts "FORM *form" "Form_Options options"
.Sh DESCRIPTION
The function
.Fn form_opts
returns the current options that are set on the given form.
The
.Fn form_opts_off
will turn off the form options given in
.Fa options
for the form, similarly,
.Fn form_opts_on
will turn on the options specified in
.Fa options
for the given form.
The form options can be set to an explicit set by calling
.Fn set_form_opts .
.Sh PARAMETERS
The following form options are valid:
.Pp
.Bl -tag -width O_BS_OVERLOAD -compact
.It O_BS_OVERLOAD
If this option is set and the cursor is at the first character in the
field then the backspace character will perform the same function as a
REQ_PREV_FIELD driver request, moving to the previous field in the
form.
.It O_NL_OVERLOAD
If this option is set and the cursor is at the end of the field then
the new line character will perform the same function as a
REQ_NEXT_FIELD driver request, moving to the next field in the form.
.El
.Pp
By default no form options are set.
.Sh RETURN VALUES
Functions returning pointers will return
.Dv NULL
if an error is detected.
The functions that return an int will return one of the following error
values:
.Pp
.Bl -tag -width E_UNKNOWN_COMMAND -compact
.It Er E_OK
The function was successful.
.El
.Sh SEE ALSO
.Xr curses 3 ,
.Xr forms 3
.Sh NOTES
The header
.In form.h
automatically includes both
.In curses.h
and
.In eti.h .