Something

void report_window_event (const AccessibleEvent *event, void *user_data)
{
  if (event)
    {
      AccessibleEvent_ref (event);
      g_print ("%d\n", Accessible_getRole (event->source));
      AccessibleEvent_unref (event);
    }
}

gpointer ldtp_thread_func (gpointer data)
{
  SPI_event_main ();
  return NULL;
}

PyMODINIT_FUNC initldtp (void)
{
  PyEval_InitThreads();

  init_error = SPI_init ();
  if (init_error)
    {
      g_warning ("Error: SPI Init\n");
      return;
    }
  ldtp_module = Py_InitModule ("ldtp", ldtp_methods);
  
  /*
   * Register event listener for windows
   */
  window_listener = SPI_createAccessibleEventListener (
          NULL, NULL);
  /*
   * Listen for new popup dialogs
   */
  if (window_listener)
      SPI_registerGlobalEventListener (window_listener,
					   "window:activate");
  AccessibleEventListener_addCallback (window_listener, report_window_event, NULL);

  ldtp_thread = g_thread_create (ldtp_thread_func, NULL, TRUE, NULL);

  return;
}