MQL5 ReferenceStandard LibraryPanels and DialogsCComboBoxOnChangeList CreateOnEventAddItemListViewItemsSelectSelectByTextSelectByValueValueCreateEditCreateButtonCreateListOnClickEditOnClickButtonOnChangeListListShowListHide OnChangeList The virtual handler of the "ChangeList" (change of the list) internal event. virtual bool OnChangeList() Return Value true - event processed, otherwise - false. OnClickButton ListShow