[rwmj]

Is my recollection correct that the screen origin (for drawing stuff) is bottom left, instead of top right as it is in most operating systems? I seem to recall reading an article about how this single fact made porting software between OS/2 and other OSes quite tedious.

[giamma]

I am sorry I can't help you here. The only UI problems I implemented were rather simple, built with IBM VisualAge which had a nice drag&drop visual editor for the screens and dialogs. http://www.os2ezine.com/v1n11/vacpp1.gif