MQL5 ReferenceStandard LibraryPanels and DialogsCButtonOnShow CreatePressedLockingOnSetTextOnSetColorOnSetColorBackgroundOnSetColorBorderOnSetFontOnSetFontSizeOnCreateOnShowOnHideOnMoveOnResizeOnMouseDownOnMouseUp OnShow The virtual handler of control "Show" internal event. virtual bool OnShow() Return Value true - event processed, otherwise - false. OnCreate OnHide