Creating C# DLLs accessed through VC++ (and vice-versa), is it possible?

Question

Hello C# chatters, Sorry but I'm to the new .NET languages and it's a long time since I last worked with VC++ (C++ in general). Is it possible to access existing VC++ implemented DLLs from C# applications and is it possible to develop a C# DLLs (or alike) and access it from VC++? Any good pointers are welcome. ;-) Thanks and regards, -Olivier Beghain.