MQL5 ReferenceStandard LibraryPanels and DialogsCBmpButtonOnSetZOrder CreateBorderBmpNamesBmpOffNameBmpOnNameBmpPassiveNameBmpActiveNamePressedLockingOnSetZOrderOnCreateOnShowOnHideOnMoveOnChangeOnActivateOnDeactivateOnMouseDownOnMouseUp OnSetZOrder The virtual handler of control "SetZOrder" (change of the OBJPROP_ZORDER property) event. virtual bool OnSetZOrder() Return Value true - event processed, otherwise - false. Locking OnCreate