No, this isn't possible. It a platform issue rather than language - C# is dependent on the .net platform and can't directly interact with anything that isn't. Otherwise, when running entirely within .net, C# and C++ (and many other languages) can int...

Adding to Scott's answer: an add-on compiled for one Archicad version will not work for any other version.You can maintain separate code to suit each version, but maintenance can rapidly become back-breaking if you need to maintain multiple add-ons a...