## DropDownItemCollecti::idx_set method Gets or sets the element at the specified index. ```cpp void Aspose::Words::Fields::DropDownItemCollecti::idx_set(int32_t index, const System::String &value)......combo box, // and then choose one of the items of text in the collection...System::MakeArray<System::String>({u"One", u"Two", u"Three"}); System...