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ehmdjii

C# Interface, C++ Engine

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Hi, lately I often hear that the interface of an application is written using C# while the background graphics part is done with C++. Now I wonder, how can you combine these two languages? How do they communicate? What setup will I have to choose in VS? thanks!

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I've done this sort of stuff before using SDL before I found SDL.NET

How I get them to communicate is through using DLL's. C# can read and manipulate C++ DLL files similar to how C++ does so this might be a good place to start.

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Not fully true.
There are three ways to make use of "native" code

1) Use C DLLs ( .NET can call exported DLL functions that adhere to the C Naming conventions directly )
2) Use COM Interop ( one can consume COM objects and .NET generates a wrapper for you to call it )

3) MANAGED C++. You can write a Managed C++ DLL that calls unmanaged C++ classes pretty easily... so you can write a wrapper for your C++ code quite easily.. This is the most flexible approach but also requires the most work. I used that in several projects ant it works very nicely.... you would setup your project something like this:

C++ Library ( DLL or Static ) -> Your Native code
Managed C++ DLL Links to C++ Library and provides wrapper classes to call the unmanaged ones..

C# Project -> References Managed C++ DLL and calls the wrapper classes..

One can alos include unmanaged/native code directly in your Managed C++ DLL with the #pragma unmanaged directive... But i would only use that for short code parts, the three tier system is cleaner IMHO..

Hope that helps.

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thank you!

so if i choose the DLL version i basically have two seperate projects in VS? the background engine as C++ project compiled into a DLL and the frontend as C# project that makes calls of this DLL. right?

thanks

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