'\" t
.\"***************************************************************************
-.\" Copyright (c) 1998-2010,2018 Free Software Foundation, Inc. *
+.\" Copyright 2018-2019,2020 Thomas E. Dickey *
+.\" Copyright 1998-2006,2010 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: form_fieldtype.3x,v 1.18 2018/07/28 22:08:59 tom Exp $
+.\" $Id: form_fieldtype.3x,v 1.21 2020/03/28 19:06:28 tom Exp $
.TH form_fieldtype 3X ""
.SH NAME
\fBform_fieldtype\fR \- define validation-field types
argument-block structure as arguments.
.SH RETURN VALUE
The pointer-valued routines return NULL on error.
-They set errno according to their success:
+They set \fBerrno\fP according to their success:
.TP 5
.B E_OK
The routine succeeded.
The field is the current field.
.TP 5
.B E_SYSTEM_ERROR
-System error occurred (see \fBerrno\fR).
+System error occurred (see \fBerrno\fR(3)).
.SH SEE ALSO
\fBcurses\fR(3X), \fBform\fR(3X).
.SH NOTES