(set-hover-focus! hover-focus? #&optional (win (get-window)))
Turn hover-focus on (#t) or off (#f) for WIN.
hover-focus makes a window automatically get focus when the mouse pointer
remains in a window frame. See set-hover-focus-delay! for controlling
the delay before the window gets focus.
Module: (app scwm hover-focus)
Defined in scheme/hover-focus.scm
at line 77 (CVS log)