void Window::OnCloseWindow(wxCloseEvent& event) {
	wxMessageDialog *dial = new wxMessageDialog(NULL,
	wxT("Are you sure to quit?"), wxT("Question"),
	wxYES_NO | wxNO_DEFAULT | wxICON_QUESTION);

	int ret = dial->ShowModal();
	dial->Destroy();

	if (ret == wxID_YES) {
		Destroy();

		NetworkManager* network = NetworkManager::getInstance();
		delete network;

		//throw -1;
	} else {
		//DO stuff like checking veto
	}
}