MQL5 ReferenceStandard LibraryPanels and DialogsCAppDialogOnClickButtonClose CreateDestroyOnEventRunChartEventMinimizedIniFileSaveIniFileLoadIniFileNameIniFileExtCreateCommonCreateExpertCreateIndicatorCreateButtonMinMaxOnClickButtonCloseOnClickButtonMinMaxOnAnotherApplicationCloseReboundMinimizeMaximizeCreateInstanceIdProgramNameSubwinOff OnClickButtonClose The virtual handler of the control "ClickButtonClose" (mouse click on close button) internal event. virtual void OnClickButtonClose() Return Value None. CreateButtonMinMax OnClickButtonMinMax