>> field_index (3) ( Linux man: Библиотечные вызовы )
NAME
form_page - set and get form page number
SYNOPSIS
#include <form.h>
int set_current_field(FORM *form, FIELD *field);
FIELD *current_field(const FORM *);
int set_form_page(FORM *form, int n);
int form_page(const FORM *form);
int field_index(const FIELD *field);
DESCRIPTION
The function set_current field sets the current field of the given
form; current_field returns the current field of the given form.
The function set_form_page sets the form's page number (goes to page
n of the form).
The function form_page returns the form's current page number.
The function field_index returns the index of the field in the
field array of the form it is connected to. It returns ERR if
the argument is the null pointer or the field is not connected.
RETURN VALUE
Except for form_page, each routine returns one of the following:
E_OK
The routine succeeded.
E_SYSTEM_ERROR
System error occurred (see errno).
E_BAD_ARGUMENT
Routine detected an incorrect or out-of-range argument.
E_BAD_STATE
Routine was called from an initialization or termination function.
