Thanks to Greg for pointing out my mis-Behavio(u)r. Those dyslexic moments can be a big sap on productivity :)
Also, by more careful use of the message archive I see that some of my problems had been addressed already; though the PersistentAnimations roadblock remains so far as I can see. I rebuilt IP using the [STAThread] attribute; and a study of avalon.py shows how to get the tutorial code working: from avalon import * def UI (): w=Window () w.Show () w.Title = "Avalon app" w.Content = ScrollViewer () w.Content.Content = TextBlock () w.Content.Content.Text = "\n".join \ (["%s:\t%s" % (k, v) for (k, v) in w.Content.__dict__.items ()]) w.Content.Content.FontSize = 10 #a = DoubleAnimation(0.0, Duration(TimeSpan.FromSeconds(3))) #a.RepeatBehavior = RepeatBehavior.Forever #w.Content.Content.PersistentAnimations[Shape.OpacityProperty] = a CallBack (UI) I displayed the dictionary of the ScrollViewer hoping to get some clue to the replacement for PersistentAnimations in the new CTP. I can't find any reference to this change in the MS documentation - does anyone know about it I wonder? One thing I observe that is presumably nothing to do with IronPython is how slow the scrolling of the text window is on what I thought was a fast PC with lots of memory and a nice video card. Anyway - I can now get WPF examples working - and maybe move onwards to tbe brave new world of 3D! _______________________________________________ users mailing list users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com