C# DllImport with C++ boolean function not returning correctly

Question

I have the following function in a C++ DLL

extern \"C\" __declspec(dllexport) bool Exist(const char* name)
{
 //if (g_Queues.find(name) != g_Queues.end())
 /         


        

Answer 1

Perhaps marshaling the argument of the function might help:

[MarshalAs(UnmanagedType.LPStr)]

Here is how the declaration should look like:

[DllImport("Whisper.dll", EntryPoint="Exist", CallingConvention=CallingConvention.Cdecl)]
        public static extern bool Exist([MarshalAs(UnmanagedType.LPStr)] string name);