What does the symbol '^' after datatypes in C++ mean?

Question

when i stumbled upon some MS headers files... i found codes like this

void App::OnSuspending(Object^ sender, SuspendingEventArgs^ args)

yes a normal function header, but notice on the parameter declaration "Object^", "SuspendingEventArgs^", i know they're somekind of classes but what is the use of "^" after each of them?

Answer 1

its not standard C++, its for compatibility with .net and signifies a .net reference type