Call dynamicly C# dll from Unmanaged c++

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Hi there,

I have a question about Interop between C# and C/C++. That's the situation :
- I need to develop a C# dll (MS VS2010)
- A c++ software (C++ Builder IDE) must call this dll in order to do some stuff

This is the code of the calling method (C++) :

C++

// Loading DLL
if (enCr == OK)
{
	asDllName =  asTagValue;// + &quot;.dll&quot;;
	sprintf(aucNameDLL, &quot;%s\\%s\\%s.dll&quot;, ExtractFileDir(argv[0]).c_str(), asDllName.c_str(), asDllName.c_str());
	if (!(hinstDLL=LoadLibrary(aucNameDLL)))
	{
		enCr = ER_LOAD_DLL;
	}
}

// Launch method
if (enCr == OK)
{
	if ((ImpDllRequest = (DLL_FUNC_REQQUEST)GetProcAddress(hinstDLL, &quot;enXmlRequest&quot;))==NULL)
	{
	enCr = ER_LOAD_FUNCTION;
	}
}

I found some informations about this kind of problem here :
http://www.codeproject.com/KB/cs/ManagedCOM.asp[^]

But I have to put in the C++ software static informations.

Does exists a way to call C# dll in a dynamic way, like my example over.

Not sure my explanations are understable but English is not my foreign language, so just ask questions, I will try to answer.

BaptX

Posted 6-Sep-10 3:10am

BaptX

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Ketan D Kulkarni · Answer 1 · 2010-09-06T23:46:00

If you want take C# dll in to native VC++ (VC 6.0 ) runtime then you may
register C# dll as COM class using regasm.exe and call functions ...

and If you are building your projects in vc++ ( VC++ studio 2008 ) with /clr option then you can just add reference of C# dll in C++ software project ....

is this clear or you need something more ...??

ARopo · Answer 2 · 2010-09-06T03:38:00

.NET dlls can be loaded dynamically using LoadAssembley.

You can't call a .net dll directly from C++ unless it is a mixed managed and unmanged dll using /CLR.

What I would do in you situation is to create a mixed C++/.NET dll to wrap your c#.Net DLL then call the C++/.NET dll directlt from the C++ dll and call the C#.NET DLL from the C++/.NET DLL as follows:

C++ DLL ---calls---> C++/NET (CLR) DLL---calls----> C#.NET Assembley

BaptX · Answer 3 · 2010-09-06T03:50:00

Solution 2

If I understand properly, you said I need to create a DLL which will do interface between my C++ Software and the C# DLL ?

Software --> Mixed DLL --> C# DLL

Is that right ?

I will search on google some informations about mixed DLL.

Posted 6-Sep-10 3:50am

BaptX

Call dynamicly C# dll from Unmanaged c++

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