Calling a class exported by a custom DLL in C#

[Vini Deep]

Hi, I have a custom dll in C++ which exports a class with certain member functions. I want to call the methods from a c# application. I am able to call the member functions seperately using the DllImports[....]. Is it possible to instantiate an object of the exported class from the C# tester application? Kindly help. Is there any link which would give me this detail. Is the source code of the DLL necessary for this. Thanks, Regards, Vini

[sammyh]

If it where me, I would create a wrapper in Managed C++, then call that from c#. That way you could totally avoid DllImports. DllImports is fine and dandy for most functions, especially win32, but once you hit a function with some off the wall data structure it turns into a pain real quick. -Sam

[Heath Stewart]

You can do this using a class factory and the CallingConvention.ThisCall calling-convention. See the CallingConvention enumeration[^] documentation for a little information about the various calling conventions and how they're used, and a previous post of mine about how to use it: http://www.codeproject.com/script/comments/forums.asp?msg=771919&forumid=1649&XtraIDs=1649&searchkw=ThisCall&sd=11%2F15%2F1999&ed=4%2F12%2F2004#xx771919xx[^].

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