function writing_default_test_input_field() {
	echo '<input name="test_input_field" id="test_input_field" type="text" value="' . attribute_escape(get_option('test_input_field')) . '" size="40" />';
}

add_settings_field('test_input_field', 'Test Input Field', 'writing_default_test_input_field', 'writing', 'default', array('label_for' => 'test_input_field'));
register_setting('writing', 'test_input_field', 'sanitize_title');

function test_writing_section() {
	echo '<p>' . __('This is a new section on the writing settings page.') . '</p>';
}
add_settings_section('test_writing_section', 'Test Writing Section', 'test_writing_section', 'writing');

function test_writing_section_input_field() {
	echo '<input name="section_test_input_field" id="section_test_input_field" type="text" value="' . attribute_escape(get_option('section_test_input_field')) . '" size="40" />';
}

add_settings_field('test_writing_section_input_field', 'Section Test Input Field', 'test_writing_section_input_field', 'writing', 'test_writing_section');
register_setting('writing', 'section_test_input_field');