+ delete cmbMonth;
+ cmbMonth = nullptr;
+
+ delete spcYear;
+ spcYear = nullptr;
+
+ btnChange->Disconnect(wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler(XCCalendarMonthSelect::UpdateMonthView), NULL, this);
+ delete btnChange;
+ btnChange = nullptr;
+
+ this->SetSizer(nullptr, true);