Interop sending string from C# to C++

Question

I want to send a string from C# to a function in a native C++ DLL.

Here is my code: The C# side:

[DllImport(@\"Native3DHandler.dll\", EntryPoint = \"         


        

Answer 1

Works fine for me with no extra marshalling instructions in VS2008:

C# side:

[DllImport("Test.dll")]
public static extern void getString(StringBuilder theString, int bufferSize);

func()
{
  StringBuilder tstStr = new StringBuilder(BufSize);
  getString(tstStr, BufSize);
}

C++ side:

extern "C" __declspec(dllexport) void getString(char* str, int bufferSize)
{
  strcpy_s(str, bufferSize, "FOOBAR");
}