anyone know how to convert C++ DLL to be compatible with C#?

What do you want to do? Convert C++ code to c# code? You can't just convert a dll, you have to rewrite it in the language you want and recompile. Can't you just reference the dll and use it as is? It doesn't matter what language a dll is written in to reference it.

Does someone want to indulge me with the reason why this is in VB.NET?

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