swi6 data how to get

hi all,

i need to write report that list down all emails that have been sent from PR workflow to the agents.

i know FM SAP_WAPI_WORKITEMS_TO_OBJECT can get the information , but i need more information for:

-'mail sent' status from swi6 ,which function/table can i get this data

-agents of the particular workitem id , where to get table/FM