How to supply the current word as a parameter to grep?

[etay . meiri]

Hi,

I have the following entries in my .emacs:

(global-set-key [(control shift f)] 'grep)
(setq grep-command "cd ~/work && find -name \"*.cpp\" -or -name \"*.h
\" | xargs grep -nH -e ")

I'd like have the current word supplied as a parameter to grep
whenever I hit the above key combination.
How do I accomplish that?

Thanks,

-Etay Meiri