There is a minor "bug" in tutorial "Gui14", "Gui15", "Gui20a", "Gui20b", and "Gui20c":
The respective line
typedef MyApp[Window] CLASSNAME;
is unnecessary.
That is true, but in this case, I think I will keep it as it is. Adding this typedef for GUI class is a good practice in U++.... (because you soon will need some THISBACK anyway