All the functions are layed out in the same general way. The title
tells you the name of the function, and what it does. The railroad
diagrams tell you what you need to enter. The description tells you
what the function returns, and how it works. The example is a short sample
showing how you might use this in an program. Examples are
usually pretty simple to keep them short. The See also section gives
cross-references to functions that have related functionality or are
often used with this function.