Hello - a friend of mine hascreated a nice portable UI (and other tools) dev kit (similar to Qt) that is cross-platform and already running on Windows, iOS and Android. I would like to help him port it to run on Haiku. I'm guessing that he has to use BWindowScreen or BDirectWindow. First Question is which one to use and why? Second, are there any tutorials/sample code for doing something like this? TIA, hey68you