Persisting centered cursor with Scroll Lock key

[Torsten Bronger <bronger@physik.rwth-aachen.de>]

Halloechen!

I want to achieve the following: When Scroll Lock is active,
i.e. when the respective keyboard diode is on, the cursor is always
in the centre of the frame.

I think I can do this myself, with something like

(global-set-key [Scroll_Lock] (whatever))

but what is the most elegant/safest way to keep the cursor in the
center of the window, no matter how the position is changed (arrow
keys, control key sequences, mouse wheel etc)?

Thank you!

Tschoe,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus