DataBindings for form controls. How?

[Lexa1983]

first of all sorry about my english, but it's all what I have :) so, that's the question. In all controls in the form in properties window (in the bottom right) appears (DataBindings). What is this and how to use it? I heard that is helps to separate all stuff about how controls react for user's action. I mean, if user click checkbox some text field can be disabled.