Sean,

First, your function in your C++ app will need to be a "C" function.
You can place the decorated name in the header for your C++ class. For
example:

extern "C"
{
       CEDB_API bool LoadProcedure();

}

Is the C++ project a dll? If so, then you'll need to add a dll imfort
for each function you want to call in your C++ dll., like this:

[DllImport("CedbXml", CharSet = CharSet.Auto)]
       public static extern bool LoadProcedure();

Let say you place your DllImport statement in a C# class called
CppApi... you'll then be able to call your C++ function liek so:

bool result = CppApi.LoadProcedure();