Accessing Dictionary Application

Hey,

I'm looking to build a vocabulary builder, and ive done so with java. One thing that crosses my mind when I look up words is the possibility for a service or script to hook the Dictionary application. I really like the interface and how you can just click on a word for its definition. So what I want to know is:

1) is it possible to hook the application so every clicked/searched word can be logged?
2) if not, can i create a service to export the word and its definition(s)?



Thanks!