Add Menu Page Dashboard WP

ADD MENU PAGE (DASHBOARD):

function formulario(){
  include('formulario.php');
}

function formulario_menu(){
  if (function_exists('add_menu_page')) {
     //add_menu_page
     add_menu_page('formulario', 'Formulario', 'edit_posts', basename(__FILE__), 'formulario');
  }
}
if (function_exists('add_action')) {
  add_action('admin_menu', 'formulario_menu');
}