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.

Administrator · Answer

I can now accessed my DLL (developed in C#) using VB6 but the only thing left is it doesn't show the intellinse feature. Do you have an idea on how to show the intellinse? Thanks very much...

Administrator · Answer

You can access dlls from C# but you need to import the api of the dll by using the dllimport attribute followed by the exact prototype of the API call equivalent in C#(return type - function name - parameters). You can call C# assemblies from VC++ if you put a COM wrapper around the assembly (the assembly must be a class library though). You can use attributes such as progid and dispid to further detail the COM interface in your C# assembly. You will also need to set a property in your Project (in Visual Studio) called register for COM Interop so that the assembly is automatically unregistered and registered with COM each time you build a new assembly or change the interface in VS.NET. -Mike G.

Administrator · Answer

Its possible but existing DLLs must be COM components. You can access existing COM Dlls by importing them using Add Reference option of VS.net. VS.NET creates a .NET wrapper in the project and internally converts the library (Dll) to a .NET assembly. You can also use TlbImp.exe and TlbExp.exe utilities to import a library to an assembly and export an assembly to a library.

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