MQL5 ReferenceStandard LibraryPanels and DialogsCWndContainerOnResize DestroyOnEventOnMouseEventControlsTotalControlControlFindAddDeleteMoveShiftIdEnableDisableShowHideMouseFocusKillSaveLoadOnResizeOnActivateOnDeactivate OnResize The virtual handler of control "Resize" internal event. virtual bool OnResize() Return Value true - event processed, otherwise - false. Note The base class method does nothing and always returns true. Load OnActivate