Holy cow, I wrote a book!
Who said it was standardized for x86?
Hooking APIs is not supported by Windows.
There may be specific interfaces that expose hooks
(like CoRegisterInitializeSpy to let you
monitor calls to CoInitialize and
and SetWindowsHookEx to let you
hook various window manager operations)
but there is no supported general API hooking mechanism
provided by the operating system.
So I don't know where you got that idea from.