AltGr + dead keys not working when SylphyHornEx is running

[vomindoraan]

My keyboard layout relies heavily on dead keys for regular typing. Whenever SylphyHornEx is running, dead keys accessed through AltGr (Right Alt) stop working altogether.

For example, in order to type á, I would normally press AltGr+1 (acute accent dead key) followed by a. However, with SylphyHornEx running in the background, this no longer works and just produces a regular a.

This happens with any keyboard layout that has dead keys on the AltGr layer (ES, PT, FR, CZ, SK, SI/HR/SR Latn, CA Mult...). However, dead keys seem to work normally if they are on the base or Shift layers. For example, in the standard Spanish layout, the ´ and ¨ dead keys (which are on the base and Shift layers, respectively) work fine, but the ~ dead key (which is on the AltGr layer) doesn't work. So it would seem that this problem has to do with how SylphyHornEx handles/intercepts AltGr key presses, or something along those lines.

The issue is reproducible. It starts occurring whenever SylphyHornEx is run and stops when it's closed.

I am unable to use SylphyHornEx until this issue is fixed, as it stops me from typing normally.

[bschwehn]

I have the same issue. I suspect that this is an issue in Open.WinKeyboardHook and this etrange02/Open.WinKeyboardHook@8b279a4 might fix it, but I have not yet tried it.