Keyboard hook bug

[amp 0]

I've noticed that this was reported couple of times here. I have multimedia keyboard and "extension" keys aren't working then Apex is focused. I'm using KeyMan (http://www.new-horizon.ru/keyman/?path=download , it should also have english UI) hotkey manager. I have Volume Up and Volume Down keys on my keyboard and they are associated to be Volume Up/Down for entire windows (default in KeyMan). So, If I have Apex's window focused, tooltip about changing volume appears, but percents are not changing. But if I focus any another window, all works as it should. Seems like a bug in DC's keyboard hooking.