I have seen pagination example in ADMIN_CMP_UserList (ie ow_system_plugins/base/components/user_list.php)

$onPage = 20;
$page = isset($_GET['page']) && (int) $_GET['page'] ? (int) $_GET['page'] : 1;

and

 // Paging $pages = (int) ceil($userCount / $onPage); 

$paging = new BASE_CMP_Paging($page, $pages, $onPage);

$this->addComponent('paging', $paging);

I found the code but don't know how it works.