$display_id = 'default';
  $view_name = 'search_custom';
  $view = views_get_view($view_name);
  $view->set_display($display_id);
  $filters = $view->display_handler->get_option('filters');
  $filters = array();
  //exposed filter to select the content type
  $filters['type']['value'] = 'multichoice';
  //exposed filter to select the node body value
  $filters['body_value']['value'] = 'test';
  $view->display_handler->override_option('filters', $filters);
  $view->pre_execute();
  $view->execute();
  print_r($view->result);exit;