I agree with Jason Mauer below(above?). I spent a fairly frustrating few hours last night with this book. The constant references to the CDROM (certainly in chapter 3/4) looks like bad editing. There was a description of 'logical units' vs pixels that was unbelievably opaque. I was glad that Charles Petzold taught me all this stuff so many years ago on Windows 3.0 (*thats* a good intro to GUI programming). Having said all that, it is (I think) the only tutorial for BeOS available, and it's good to see that gap being filled. It beats learning from the samples and the Be Book, but it definitely isn't up to O'Reilly's normally very high standards.