And the second is in the main body of the script where execution continues after the handler is finished doing its job. There you have to capture the result. See the example below. The handler passes the value back, which you have to assign to a variable or use in another handler or statement. That's about it for this week.
Handlers are exceedingly important.
Learning how to write good ones is a skill you will want to develop. If there's something in today's discussion that you would like expanded or clarified, then let me know. It's important that you understand this. We've left out a few details that aren't necessary to start using handlers effectively, and we have to talk about labeled parameter handlers later on, but this will get us well on our way. As usual, send in any comments, criticisms, thoughts.