How to call a c++ class method in my c# windows Application

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I'm trying to use c++ class method in my c# windows application

I use this

C#

[DllImport("ZKNetLib.dll", EntryPoint = "ZK_NET_DEV_SetEventCallBack")]
        public static extern int ZK_NET_DEV_SetEventCallBack(int u32Handle, ref OnEventCallBack u32Event, IntPtr pUserData);

to import the dll and their method

But, in dll method there are some other methods are also used, which i fine very tough to find out
what exactly is happening. Like, in above import there is "OnEventCallBack" method that dll is using. So, is there any way to use these c++ class and header files in my windows application.

I, heard of using c# application class in c++ by making the class object and using there namespace.

So, i was wondering there should be any way of using these header file and class into my c# application too.

Please help. I'm so confused in all this.

Posted 16-Jan-14 20:52pm

Member 10486677

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Richard MacCutchan 17-Jan-14 4:42am

you should check the documentation for the DLL or talk to the person who created it.

Member 10486677 31-Jan-14 1:13am

i do check the documentation and use it to pass the value... but someone told me that i should use a wrapper to call these dll. I don't know how to make a wrapper. plzzz help

Richard MacCutchan 31-Jan-14 3:18am

Sorry, but I don't have the documentation for this library so I have no idea why it doesn't work. You should talk to the people who produce the library. I have no idea whether creating a C-style wrapper would help, but again you need to consult the documentation.

Member 10486677 31-Jan-14 5:52am

I have sdk in vc++ and also its documentation.. i can provide it to you if you want to...
I want to develop my application in c# by using these vc++ dll.

Richard MacCutchan 31-Jan-14 6:28am

Sorry but I am not going to read a load of documentation on some library that I know nothing about. I have other calls on my time.

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Vladimir Svyatski · Answer 1 · 2014-01-16T22:53:00

I don't think it's really possible to call any C++ class methods from C# directly (even by using DllImport). You should create a C style wrapper function which calls the class method you need. I mean good old plain C language without any classes. The function should have stdcall naming convention. Possibly you will have to create a small additional DLL which exports your wrapper function.