How to create a drop down list with pages to a themes options page?

I have found the solution. I used the wordpress function wp_dropdown_pages

<?php function  combo_select_page_callback() {
$options = get_option('function plugin');
    wp_dropdown_pages(
        array(
             'name' => 'function plugin[ID used to identify the field throughout the theme]',
             'echo' => 1,
             'show_option_none' => __( '&mdash; Select &mdash;' ),
             'option_none_value' => '0',
             'selected' => $options['ID used to identify the field throughout the theme']
        )
    );
} ?>