Bernie, Nice outline. This may help me get there, eventually. I know I'm behind the times, but would you clarify for me.... Does this mean handleevents, window and button statements will not work in 10.5 (Rosetta), or merely that the new way is better/preferable? In Leopard, is there no possibility of running a 4-line program like I proposed, without firing up IB? e-e =J= a y " On Jan 14, 2008, at 4:32 AM, Bernie wrote: > FB apps run just fine here on MacBook Pro / OS X 10.5.1. > > Tips: >  Use RunApplicationEventLoop() instead of do : HandleEvents : > until gFBQuit. >  Use carbon event handlers instead of on xxxxxx fn > XxXxxxxx (WNE) handlers. >  Build UI with Interface Builder instead of FB's appearance > window/appearance button statements. >  Give all windows the standard handler and compositing attributes. >  Use WindowIDs and ViewIDs instead of FB's window and button > numbers.