Hi jams90,
Calling C DLLs through the PInvoke mechanism should work for any C functions. I see the extern “C” declaration was used on the functions so it should play nice with C#. Unfortunately we don’t develop here in C# so we can’t be of much assistance. Last time I needed to call a C DLL from C# though, I found a lot of information online about doing so with many examples.
Regards,
A.J.