Transactions and Tables for Work Item Trace

[Peggy Stammler]

Hello,
 
I'm looking for transactions and/or tables where I can:
        1st. get all work items already executed and not yet executed
        2nd. see the log for all work items (not only the ones I executed)
And I'm looking for a possibility to delete the executed work items from the
workplace outbox.
 
Can anybody help me?
 
Many Thanks
Peggy