MQL5 ReferenceStandard LibraryPanels and DialogsCWndObjOnSetFontSize OnEventTextColorColorBackgroundColorBorderFontFontSizeZOrderOnObjectCreateOnObjectChangeOnObjectDeleteOnObjectDragOnSetTextOnSetColorOnSetColorBackgroundOnSetFontOnSetFontSizeOnSetZOrderOnDestroyOnChange OnSetFontSize The virtual handler of "SetFontSize" (change of the OBJPROP_FONTSIZE property) event. virtual bool OnSetFontSize() Return Value true - event processed, otherwise - false. Note The base class method does nothing and always returns true. OnSetFont OnSetZOrder