Haha, ok. Sorry about not uploading it yet BTW. I'll get around to it later tonight I promise

For the authoritive word on windows in the Win32 API, including messages and hooking, have a look here, straight from the horse's mouth

As for subclassing, all that is is replacing the WndProc of a window within your thread with one you provide yourself. You need to store the pointer to the old window procedure (from the point at which you started subclassing) and call that from your replacement WndProc, so that the previous code can execute also. But the best part is, you get to muck with the messages and their parameters as they come through, and achieve what you want that way.

You'll hopefully understand that last paragraph, once you've read through the link above it