My question is a short one: where is this class name combo box "...in the upper left corner of your code editor" discussed in step 2 of the Try It Out Using For Each... Next with an Array?

It is probably right in front of me but I am just not seeing it. Thank you very much.

If the Class name in MainWindow.xaml.vb (code view) = MainWindow
then change the Class=name as follows...<Window x:Class="MainWindow" in the
MainWindow.xaml window. It is probably Windows1.

Or you can use Windows1 in both, but they have to match.

Then everything will show up as described and the code will work as as posted.

I am new to this too. I kind of stumbled on the answer after 4 frustrated hours of research.
Good luck with the rest of the book.

isn't it the very top of the code editor box?
if you look at the line right below "Form1.vb", you'll see there are two "boxes" split down the middle of the code.
scroll all the way to the top of the code and click right after "public class form1".
the boxes should read "Form 1" and "(Declarations)"
that is where you find the drop downs for this part.