Catching key press events

[Arthur Barlow <arthurbarlow earthlink net>]

I've designed a form with Glade to be the front end to a database  
application.  I'm using a variety of text/entry and treeview  
components to display the data.  I want to grab "page down" and "page  
up" key events to move through records.  I was looking in the GTK+  
API documentation and I saw a number of references to GDK regarding  
keyboard events.  However, the GTK docs also mentioned a function  
called "gtk_main_do_event" that is supposed to be used to process GDK  
events.  I'm confused if this is just for passing an event or can be  
used for filtering.

So, my question is simple.  What is the best way for the main form to  
catch a key press event?  Any snippets of code would be appreciated.