When you create a custom post type and Publish/Save Draft/Save the custom post type, you will receive the default ‘Post Updated’ message. Use the WordPress ‘post_updated_messages’ filter to create your own update state messages.
Product developer at WPEngine and runner from Hampshire, Illinois. I work with php a lot; Spending most of my time digging into source code to see how it all works. You can find me on Twitter @rfmeier.