Create a C# DLL That Can Be Imported in a Delphi App Using stdcall - Possible?

Question

I have a program that I need to create a DLL for, hopefully in C#. The program is written in Delphi and I have an interface file to code to. The interface uses the stdcall

Answer 1

I'm assuming here that the Delphi app is not a .NET based app and therefore you need to host the .NET runtime in a Win32 process.

• Hosting the .NET runtime in a Delphi Program
• .Net interop - using C# assembly from Delphi Win32
• CorBindToRuntimeEx

CorBindToRuntimeEx is a function inside MSCorEE.dll, which holds the .NET runtime. With it you can host the runtime and then create objects inside it and interact with them.

Answer 2

This is not directly possible. C# is managed code. This means that it requires a very specific runtime environment in order to function, an environment which Delphi could not directly provide to it. It is not like C where you simply find the address and calling convention of the function and call it.

However, it is possible to host the Common Language Runtime inside of a Delphi application (or any other Windows application). I have no idea how to do this. I just know that it's possible. (It's quite likely that's what this 'Hydra' that Steve mentioned will do.)

Answer 3

Have a look at Hydra