Creating controls is certainly something most developers will have to do...many times you have to do it a bunch. He has created many controls that I have myself (although he has some more interesting implementations), but the "Why" behind it really gets you thinking. he also has a lot of controls I never thought of, but have put into practice already. I had the book for about an hour before I put it down b/c I saw a ton of places to use his ideas in an app I was working on.

Then he makes the case for component based programming in general. Sure, we all know we should re-use stuff. But many of us get in a hurry and forget to build things specifically with re-use in mind. I wont' make that mistake again.

I can't say enough about this book, but you'll definitely like it. After i got a copy of it, the rest of my department eventually got a copy b/c everyone wanted to borrow it because of it's killer content. Everyone else shared my sentiments.

I only wish John would quit his day job and write more books, few people do it as well as he does.