Well I've been working on the windowing system again for the past week.
I posted up the Mac OS themed version. Now here's the BeOS version.
It is still buggy as all hell, but i spent hours making the BeOS buttons look pixel accurate.
Because of all that effort I figured i'd post it. The window moving has also been fixed up a bit.
Getting closer slowly to where I was before I lost the good version.
Let me know how it works for you.