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.\"***************************************************************************
.\" Copyright 2018-2022,2023 Thomas E. Dickey *
.\" Copyright 1998-2010,2015 Free Software Foundation, Inc. *
.\" *
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.\" furnished to do so, subject to the following conditions: *
.\" *
.\" The above copyright notice and this permission notice shall be included *
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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.\"***************************************************************************
.\"
.\" $Id: form_userptr.3x,v 1.34 2023/11/25 13:58:47 tom Exp $
.TH userptr 3FORM 2023-11-25 "ncurses 6.4" "Library calls"
.SH NAME
\fBset_form_userptr\fP,
\fBform_userptr\fP \-
associate application data with a form item
.SH SYNOPSIS
.nf
\fB#include <form.h>
.PP
\fBint set_form_userptr(FORM *\fIform\fP, void *\fIuserptr\fP);
\fBvoid* form_userptr(const FORM *\fIform\fP);
.fi
.SH DESCRIPTION
Every form and every form item has a field that can be used to hold
application-specific data (that is, the form-driver code leaves it alone).
These functions get and set the form user pointer field.
.SH RETURN VALUE
The function \fBform_userptr\fP returns a pointer (which may be \fBNULL\fP).
It does not set \fBerrno\fP.
.PP
The function \fBset_form_userptr\fP returns \fBE_OK\fP (success).
.SH PORTABILITY
These routines emulate the System V forms library.
They were not supported on
Version 7 or BSD versions.
.PP
The user pointer is a void pointer.
We chose not to leave it as a char pointer for SVr4 compatibility.
.SH AUTHORS
Juergen Pfeifer.
Manual pages and adaptation for new curses by Eric S. Raymond.
.SH SEE ALSO
\fB\%ncurses\fP(3NCURSES),
\fB\%form\fP(3FORM)
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