KeyboardHook installing itself without apparent reason

[pneumatic]

The first instance of the below script has no keyboard hook, however any more instances have their keyboard hook installed.

Code: Select all

#SingleInstance Off
#Persistent
#NoEnv
SetBatchLines -1
DetectHiddenWindows On
KeyHistory
Return

^!Numpad1::
return

[just me]

I guess that AHK uses the hook because the hotkey has been registered already by the first instance.

[lexikos]

just me is correct; you can't register the same hotkey multiple times.

Even if the reason is not apparent, AutoHotkey using the keyboard hook to implement a hotkey is not a bug. If the system denies hotkey registration for any reason, or the hotkey is of a type which can't be registered, the hook is used. AutoHotkey inherently has no control over whether registration succeeds.