mh0 wrote:As per the documentation you quoted, neither WheelUp nor WheelDown should work
No, the documentation does not say what will happen if you try to use them. It says they are
not supported. Neither WheelUp nor WheelDown work
as you would expect with remapping, but they both have some effect, and both have the same effect aside from scrolling up vs. down (but this isn't guaranteed by the documentation).
do you know why one of them (WheelDown) does however work?
It does not. WheelUp vs WheelDown is irrelevant. As I said, "if I press Ctrl + AppsKey + Up, the system does not detect Up, but Down works fine." If the system does not detect Up, the hotkey never fires, so the script never sends WheelUp in the first place.
Keyboards cannot possibly detect all possible combinations of random keys. Generally they must support all combinations of the
standard modifiers, but not necessarily non-modifier keys such as AppsKey. In my case, if Ctrl and AppsKey are held down, the system can detect Down but cannot detect Up. The two keys have difference placement within the keyboard circuitry.
I wonder why it was working for @gregster though? Or did you mean it is a limitation of certain keyboards, but not others.
I only spoke of my own issue, though I would assume yours has the same cause. I have no reason to think that any two different keyboard models would have the same circuitry design. I assume that the circuitry is physically incapable of detecting certain combinations.
Mine is a Microsoft Sculpt keyboard.
