Hi AndyB, I've looked through a bit of the code, it's exported via the commserver app which hasn't been touched in a while. I got it to compile after fixing a few errors. It's a lot more complicated than you'd expect. If I can get the new values inserted into the shared memory data structures, I have no idea how to test it. All I can do is hand it off to you and you'll have to test it and tell me what went wrong. C++ is not my native language, it always takes me a while to figure out what the other guy did.