How to use VC++ application in C#.net desktop application

Question

I have one API that was developed in VC++ and use that API in my C# desktop application. I have no idea how to do that.

Answer 1

You could consider wrapping the C++ API in C++/CLI then you will be able to call it from C#.
There are some details here

In essence, for a native class define in NativeClass.h you can use it in a C++/CLI project as follows:

#include "NativeClass.h"

public ref class NativeClassWrapper {
    NativeClass* m_nativeClass;
};