MQL5 ReferenceStandard LibraryPanels and DialogsCButtonOnSetFontSize CreatePressedLockingOnSetTextOnSetColorOnSetColorBackgroundOnSetColorBorderOnSetFontOnSetFontSizeOnCreateOnShowOnHideOnMoveOnResizeOnMouseDownOnMouseUp OnSetFontSize The virtual handler of control "SetFontSize" (change of the OBJPROP_FONTSIZE property) event. virtual bool OnSetFontSize() Return Value true - event processed, otherwise - false. OnSetFont OnCreate