Herbert König wrote:
> AR> Try:
> 
> AR>    DisplayScreen depth: Display depth width: 800 height: 600 fullscreen:
> AR> false
> 
> oh dear me, knowing that would have saved me loads of time :-))
> I will look through Display and DisplayScreen for other useful things.
> 
> I believe, when I want to change the window frame (no frame, no close
> button..) will be when I will have to resort to a plugin anyway.

In which case the answer is similarly simple if you remember the write a 
primitive that returns the "outer window size". E.g.,

   delta := DisplayScreen outerWindowSize "outer window size"
              - DisplayScreen actualScreenSize. "client area"
   DisplayScreen outerWindowSize: myExtent + delta.

Cheers,
   - Andreas