MQL5 ReferenceStandard LibraryPanels and DialogsCRadioGroupCreateButton CreateOnEventAddItemValueCreateButtonOnVScrollShowOnVScrollHideOnScrollLineDownOnScrollLineUpOnChangeItemRedrawRowStateSelect CreateButton Creates new CRadioButton class instance at a specified index. bool CreateButton( const int index // index ) Parameters index [in] Index of the new item in the CRadioGroup. Return Value true - successful, otherwise - false. Value OnVScrollShow