Read FPM event in webdynproABAP

Hi All,

I have webdypnrpo application, embedded in FPM. This is standard application.

Whenever the document is 'Edit' I want to restrict few fields in webdynpro screen.

My requirement is  , I would like to know , how to check the action of FPM in webdynpro i.e. (similar to ECC sy-ucomm)

Thanks

Amarender Busireddy