description Learn more about: How to: Hold Reference to Value Type in Native Type title How to: Hold Reference to Value Type in Native Type ms.custom get-started-article ms.date 11/04/2016 helpviewer_keywords value type reference in native type reference to value type in native type ms.assetid 1eabf8be-7d4f-4339-9027-48d5c4244483 How to: Hold Reference to Value Type in Native Type Use gcroot on the boxed type to hold a reference to a value type in a native type. Example // reference_to_value_in_native.cpp // compile with: /clr #using <mscorlib.dll> #include <vcclr.h> using namespace System; public value struct V { String ^str; }; class Native { public: gcroot< V^ > v_handle; }; int main() { Native native; V v; native.v_handle = v; native.v_handle->str = "Hello"; Console::WriteLine("String in V: {0}", native.v_handle->str); } String in V: Hello See also Using C++ Interop (Implicit PInvoke)