User Guide > Objects > Object Actions
The some objects can respond to various events.
An event is something that occurs at run time while the user is using your application. This includes things like moving the mouse over an object (an "On Mouse Over" event) or clicking on an object (an "On Mouse Click" event).
You can assign actions to these events to make your application respond to them. Actions tell your application to do something specific whenever the event they're assigned to occurs. For example, you could run installer file when the user clicks on a "Install" button, or show next page when the user clicks on a "Next Page" button.