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Asked: 2026-05-10T16:09:55+00:00

I have a function in a native DLL defined as follows: #include <string> void

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I have a function in a native DLL defined as follows:

#include <string> void SetPath(string path);

I tried to put this in Microsoft’s P/Invoke Interop Assistant, but it chokes on the ‘string’ class (which I think is from MFC?).

I have tried marshaling it as a variety of different types (C# String, char[], byte[]) but every time I either get a NotSupportedException or a Native Assembly Exception (depending on what marshaling I tried).

As anyone ever done Native/Managed Interop where the native string class is used? Is there any way to Marshal this? Am I going to have to write my own Marshaler?

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1 Answer

  1. Looks like you’re trying to use the C++ standard library string class. I doubt that will be easy to Marshal. Better to stick with a char * and Marshal as StringBuilder. That’s what I usually do. You’ll have to add a wrapper that generates the C++ string for you.

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