function vkExUnit_setting_menu_parent()
{
    global $menu;
    $parent_name = vkExUnit_get_little_short_name();
    $Capability_required = 'activate_plugins';
    $custom_page = add_menu_page($parent_name, $parent_name, $Capability_required, 'vkExUnit_setting_page', 'vkExUnit_add_setting_page');
    if (!$custom_page) {
        return;
    }
}
function vkExUnit_adminbar_link($wp_admin_bar)
{
    global $current_user;
    get_currentuserinfo();
    if ($current_user->ID == '') {
        return;
    }
    if (!user_can($current_user->ID, 'activate_plugins')) {
        return;
    }
    $args = array('id' => 'veu_adminlink', 'title' => vkExUnit_get_little_short_name(), 'href' => admin_url() . 'admin.php?page=vkExUnit_main_setting', 'meta' => array());
    $wp_admin_bar->add_node($args);
    $wp_admin_bar->add_node(array('parent' => 'veu_adminlink', 'id' => 'veu_adminlink_active', 'title' => __('Active Setting', 'vkExUnit'), 'href' => admin_url() . 'admin.php?page=vkExUnit_setting_page'));
    $wp_admin_bar->add_node(array('parent' => 'veu_adminlink', 'id' => 'veu_adminlink_main', 'title' => __('Main Setting', 'vkExUnit'), 'href' => admin_url() . 'admin.php?page=vkExUnit_main_setting'));
    do_action('vkExUnit_action_adminbar', $wp_admin_bar);
}
 function form($instance)
 {
     echo '<div style="padding:1em 0;">';
     _e(sprintf(__('*It is necessary to set the "%s" -> "Contact Information" section in "Main setting" page.', 'vkExUnit'), vkExUnit_get_little_short_name()));
     echo '</div>';
     return $instance;
 }