I tried that too. It doesn't seem to work

I have a simple form just to test this.
On the form there is a button and an editbox. With this as the script for Button::click()

Thisform.Edit1.SetFocus
Keyboard '{PGDN}'
This.SetFocus

What you said works if I take out the This.Setfocus line. It works great.

So. The problem is not that it is not "page-downing", the problem is it's "page-uping" when I set the focus back to the button. Does this make sense?