Stop gtk_dialog from auto-closing

[Russell Shaw <rjshaw iprimus com au>]

Hi,
I made a dialog with OK, Apply, and Cancel buttons:

void
dialog_bg(ObjClass *obj)
{
    GtkWidget* dialog=gtk_dialog_new_with_buttons("Grid Settings",NULL,
      GTK_DIALOG_MODAL|GTK_DIALOG_DESTROY_WITH_PARENT,
      GTK_STOCK_OK,GTK_RESPONSE_OK,
      GTK_STOCK_APPLY,GTK_RESPONSE_APPLY,
      GTK_STOCK_CANCEL,GTK_RESPONSE_CANCEL,
      NULL);

    gtk_widget_show_all(dialog);

    g_signal_connect(G_OBJECT(grid),"expose_event",G_CALLBACK(expose_event_callback),(gpointer)obj);
    g_signal_connect(G_OBJECT(dialog),"response",G_CALLBACK(resp_cb),NULL);

    gint resp=gtk_dialog_run(GTK_DIALOG(dialog));
    gtk_widget_destroy(dialog);
}

When i click the Apply button, how do you stop the dialog from closing?