'\" t
.\" $OpenBSD: form_field_userptr.3,v 1.6 1998/09/17 04:14:35 millert Exp $
.\"
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.\" $From: form_field_userptr.3x,v 1.5 1998/08/27 21:21:04 Rick.Ohnemus Exp $
.TH form_field_userptr 3 ""
.SH NAME
\fBform_field_userptr\fR - associate application data with a form field
.SH SYNOPSIS
\fB#include <form.h>\fR
.br
int set_field_userptr(FIELD *field, void*userptr);
.br
void *field_userptr(const FIELD *field);
.br
.SH DESCRIPTION
Every form field 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
that field.
.SH RETURN VALUE
The function \fBfield_userptr\fR returns \fBNULL\fR on error. The function 
\fBset_field_userptr\fR returns one of the following:
.TP 5
\fBE_OK\fR
The routine succeeded.
.TP 5
\fBE_SYSTEM_ERROR\fR
System error occurred (see \fBerrno\fR).
.SH SEE ALSO
\fBcurses\fR(3), \fBform\fR(3).
.SH NOTES
The header file \fB<form.h>\fR automatically includes the header file
\fB<curses.h>\fR.
.SH PORTABILITY
These routines emulate the System V forms library.  They were not supported on
Version 7 or BSD versions.

The user pointer should be a void pointer.  We leave it as a char pointer for
SVr4 compatibility.
.SH AUTHORS
Juergen Pfeifer.  Manual pages and adaptation for new curses by Eric
S. Raymond.
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