## 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)......the element at the specified index. ```cpp void Aspose::Words:...mCollecti::idx_set(int32_t index, const System::String &value)...