James,

That's because the PageFrame subclass was created with a PageCount != 0.

When you do this it names the pages (although they could be changed there in the subclass), but in further subclasses or instances of the PageFrame on a form you can not change the name. In general you can't alter the names of contained objects because the class itself may have code that refers to those objects by those names.

If you create the PageFrame subclass with 0 pages, then for subclasses or instances you are free to set the PageCount and name the pages as you please.

>Welllll ---
>
>It appears that the two pages that were added automatically when the PageFrame was created are named "Page1" and "Page2", and cannot be changed. That is what I was referring to, not having inspected the third page ....
>
>I added the third page myself, and it does allow me to change the name.
>
>So, it appears that if I had deleted the original pages, then added them back in myself, I would have been OK.