Calling C++/CLR function from C# - passing parameters not working

Question

I'm trying to call a function in a C++/CLR dll from a C# dll. -> this is working pretty well.

The issue I'm facing is the parameters which should be passed from C# to the function in C++/CLR are not arriving correctly in C++.

In the end I need to pass an array of strings and some boolean parameters from C# to C++/CLR.

What I have done/tried so far:

My C++/CLR part Looks like this:

__declspec(dllexport) void __cdecl BCFConsumer::Translatehelper(char **IDs, int len, bool blinking, bool highlight, bool showOnly, bool zoom){
    vector<std::wstring> IDsVec;
    std::wstring tmp;
    msclr::interop::marshal_context context;

    for (int i = 0; i < len; i++) {
        IDsVec.push_back(std::wstring(IDs[i], IDs[i] + strlen(IDs[i])));
    }

    ShowElements(IDsVec, blinking, highlight, showOnly, zoom);
}

My C# (dll-import) part looks like this:

[DllImport("BCF.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "?Translatehelper@BCFConsumer@@QEAAXPEAPEADH_N111@Z")]
        public static extern void Translatehelper(string[] IDs, int size, bool blinking, bool highlight, bool showOnly, bool zoom);

The function call in C# looks like this:

    public void btnshow_Click(object sender, RoutedEventArgs e)
            {
                IDs.Add("0znBcjLrbFBxuK9yivEUEO");
                IDs.Add("0cLtxHLKfA9x58$Mi2DnUp");
                Translatehelper(IDs.ToArray(), IFCIDs.Count, _blinking, _highlight, _showOnly, _zoom);
            }

IDs is defined like this:

public List<string> IFCIDs = new List<string>();