If you have played with both the PDC and the WinHEC build of Longhorn (Build # 4074) and in your small applications if you had a class called SimpleText - that code would now give an exception in the new build with the error “Class not found”. So out of curiosity I <strong>asked</strong> on the newsgroups what was up with it and found out that Microsoft has consolidated their three classes to handle text to two - which help solve some of the confusion. Filipe Fortes who is the Avalon PM also discusses it in a blog <strong>here</strong> .