Skwire - I really love this!  I publish a children's magazine and am always creating word puzzles.  This gives me some ideas.
What language did you write this in? I'm guessing C++.  It's very neat and trim and fast.

HAha Skwire - necro-thread, well, you know, in the application it links to this thread...
Autohotkey, eh?  Like me!  Maybe I'll have to get some tips from you sometime!