以下是我所知的最简单的实现，因为没有真正的API：

//add the needed scripts and styles
add_action(\'admin_enqueue_scripts\', \'wpse_46028_enqueue_admin_scripts\');
function wpse_46028_enqueue_admin_scripts() {
    wp_enqueue_style(\'wp-pointer\');
    wp_enqueue_script(\'wp-pointer\');
    //hook the pointer 
    add_action(\'admin_print_footer_scripts\', \'wpse_46028_print_footer_scripts\' );
}
function wpse_46028_print_footer_scripts() {
    $pointer_content = \'<h3>WordPress Answers</h3>\';
    $pointer_content .= \'<p>This is your pointer content</p>\';
?>
   <script type="text/javascript">
   //<![CDATA[
   jQuery(document).ready( function($) {
    //jQuery selector to point to 
    $(\'#menu-dashboard\').pointer({
        content: \'<?php echo $pointer_content; ?>\',
        position: \'top\',
        close: function() {
            // This function is fired when you click the close button
        }
      }).pointer(\'open\');
   });
   //]]>
   </script>
<?php
}