What is hook methods in web dynpro abap

Hook methods are the default methods created by Webdynpro framework itself for every view, controller and context. Actually these methods trigger at run-time on various stages of a webdynpro life cycle. E.g. when you launch an application, there are methods where you can modify the screen elements at run-time. You can also check user input and validate. Also based on user action what should be next step can be decided. So these many functionality can be achieved by these hook methods.

There are many such method available in Webdynpro abap. You just have to find out the accurate one and write your code to achieve the functionality. Check out the list of such methods.