Calling C# dll from old C code

[Glenn Roberts]

Hi,

I have old C (not C++) code which I want to keep, but want to add extra
functionality by calling functions from a C# dll.
....Is this (easily) possible ?

Thanks !

 

[Nicholas Paldino [.NET/C# MVP]]

Yes! It definitely is. Take a look at the section in the .NET framework documentation titled "Platform Invoke Tutorial" located at (watch for line wrap):

http://msdn.microsoft.com/library/d...us/csref/html/vcwlkPlatformInvokeTutorial.asp

The P/Invoke layer is what is used to call native code exposed through function exports in DLLs.

Hope this helps.

 

[Dmitriy Lapshin [C# / .NET MVP]]

Hi Glenn,

The easiest way would probably be to expose your C# classes as COM objects
and call them from the unmanaged code like any other COM object.

 

[Willy Denoyette [MVP]]

I suppose you want to call into C# from C.
The only way to do this is by using COM interop.

Willy.

 

[Stu Smith]

Could be taken two ways...

Do you want to call C from C#, or call C# from C?