MQL5 ReferenceStandard LibraryPanels and DialogsCBmpButtonOnDeactivate CreateBorderBmpNamesBmpOffNameBmpOnNameBmpPassiveNameBmpActiveNamePressedLockingOnSetZOrderOnCreateOnShowOnHideOnMoveOnChangeOnActivateOnDeactivateOnMouseDownOnMouseUp OnDeactivate The virtual handler of control "Deactivate" internal event. virtual bool OnDeactivate() Return Value true - event processed, otherwise - false. OnActivate OnMouseDown