thnee

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	}}