Variable: subword-mode-hook
subword-mode-hook is a customizable variable defined in subword.el.gz.
Value
(subword-mode--set-explicitly(var)/subword-mode--set-explicitly(fun))
Documentation
Hook run after entering or leaving subword-mode(var)/subword-mode(fun).
No problems result if this variable is not bound.
add-hook automatically binds it. (This is true for all hook variables.)
Source Code
;; Defined in /usr/src/emacs/lisp/progmodes/subword.el.gz