Passing keyboard keystroke events to another widget

[Dru <andru treshna com>]

Hello. I want to send a copy of keyboard events received on one widget 
to another widget also. This is for a GTKTreeView where if the user 
types into a cell, it will pass the typed text to another gtk_entry box 
on the window also. This is similar to how gnumeric operates with its 
grid and direct entry box.  Does anyone know how i can acheive this?