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.\" $Id: form_field_userptr.3x,v 1.10 2010/12/04 18:40:45 tom Exp $
.TH form_field_userptr 3X ""
.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 a pointer (which may be \fBNULL\fR).
It does not set errno.
.PP
The function \fBset_field_userptr\fR returns \fBE_OK\fP (success).
.SH SEE ALSO
\fBcurses\fR(3X), \fBform\fR(3X).
.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.
.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.