Sometimes reading a reference or a specification just doesn't cut it.
Sometimes it requires a little more detail, perhaps with an example or two.
This is where a good tutorial comes in handy.
Sometimes a good tutorial will have the answers to your questions.
Do you know of a good tutorial? Perhaps you have written one and wish to share it.
Tell us about it. You can send me a PM with your suggestion and I will arrange for you to have access to post it.