Back to General and Gameplay Programming

[.net] Using a class from an unmanaged C++ dll in C# ?

matches81 · 2006-05-29T06:52:51

Hi there! I´ve written a tiny graphics engine in unmanaged C++ using unmanaged DirectX. This engine is compiled into a dll. Now using that dll in another C++ project is not a problem, works like a charm. However I thought about getting acquainted with C# and started to code a simple little chess (without AI, just for 2 players ;)). Now for that chess I would like to use that graphics engine of mine to display it. After finding some info about calling C++ functions from C#, I happily started typing that wrapper-class. But during the first function definition I noticed that all those function were static, like this: [DllImport("Engine.dll")] public static extern int AddDynamicObject(StringBuilder mesh, StringBuilder effect, StringBuilder colorTex, float x, float y, float z); Now, that is a problem, because I need to instantiate one object of the Engine class to work with it. So I would need to somehow instantiate that unmanaged C++ class in C# and call the functions of that object. I assume I would somehow have to declare a new class in C# that resembles the C++ class, but as the Engine class of course contains other objects of unmanaged classes I fear I would have to declare classes resembling those two, which would lead me to reconstruct the whole engine structure in C# in the end. To make things easier here is the header of the Engine class, which is used to control that tiny engine: class __declspec(dllexport) Engine { public: Engine(void); ~Engine(void); int Init(HWND inWindowHandle, bool fullScreen); int Update(LONGLONG time); void ShutDown(); int AddStaticObject(LPCTSTR meshLoc, LPCTSTR effectLoc, LPCTSTR colorTex, float x, float y, float z); bool RemoveStaticObject(int inID); int AddDynamicObject(LPCTSTR meshLoc, LPCTSTR effectLoc, LPCTSTR colorTex, float x, float y, float z); bool RemoveDynamicObject(int inID); Renderable* GetDynamicObject(int inID); int LoadStaticMeshFromFile(LPCTSTR fileLoc); int LoadTextureFromFile(LPCTSTR fileLoc); int LoadEffectFromFile(LPCTSTR fileLoc); private: HWND m_WindowHandle; GFX::Graphics* m_pGraphics; }; I´m quite new to C# and would really appreciate your help with this.

General and Gameplay Programming Programming

Started by matches81 May 27, 2006 01:23 PM

10 comments, last by matches81 17 years, 11 months ago

Enselic

829

May 29, 2006 06:31 AM

You might find the HandleRef useful for that.

[s]--------------------------------------------------------[/s]chromecode.com - software with source code

matches81

474

Author

May 29, 2006 06:52 AM

Thx! Will read into that...
However that error was caused by another stupidity of me:
Should have set bFullscreen to false of course. I can only assume that I can´t initialise a fullscreen device with a panel that is a child form or something like that.
Everything works now :)

[.net] Using a class from an unmanaged C++ dll in C# ?

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

[.net] Using a class from an unmanaged C++ dll in C# ?

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

Reticulating splines