Compile C# code into a DLL and access that C# DLL from VB6.0 declaring it as an API call

Question

In my VB6.0 days I used tons of windows API. So I got the idea that all the API methods that I declared are pretty much procedure based - or it has a procedure based entry point.

My question:

I have written some code in C# which I need to access from VB6.0. Is it possible to compile my C# code into a DLL and access that C# DLL from VB6.0 declaring it as an API call? If so, how is this done ?

(I have already tried making my C# DLL COM compliant, and it worked - but I would like to try the above mentioned approach anyway)

Is there any particular reason why you don't want to make the C# DLL COM compliant? — MarkJ
– MarkJ, Commented May 1, 2009 at 13:06

itowlson · Accepted Answer · 2009-04-28 07:31:11Z

4

No, you can't expose the entry points to your C# DLL as Win32-style APIs. If you really, really need to create procedural entry points for a .NET library, probably the best thing to do is create a mixed-mode wrapper library using C++/CLI. But this seems like hard work: exposing your C# classes as COM objects is likely to be a lot less effort and much easier to maintain.

answered Apr 28, 2009 at 7:31

itowlson

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Ant · Accepted Answer · 2009-04-28 16:03:03Z

0

If you're happy to get your hands (very) dirty, you can do what you want by using MSIL. Have a look at this CodeProject project for a walkthrough.

answered Apr 28, 2009 at 16:03

Ant

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