I have a keydown event on a window that works as expected. But when adding a listbox (with no keydown event) to the window, the up and down arrows don’t trigger the event. Left and right arrows work as expected. I went ahead and added a keydown event to the listbox to see if it would catch the up/down arrows. It did.
So is this a bug? I would think so considering the left/right arrows aren’t affected. Or is there some special relationship between listboxes and up/down arrows where it would be expected that those keys would be intercepted, regardless of a keydown event existing or not?