Please give your threads better titles.
The question you've asked is largely nonsense. I don't know if it's a translation issue, or what, but it's not making sense.
What's "event code"? How is it entered? How are events (whatever they are) compared?
What does "Y NOT DONE YET" mean?
Who are the "we" that mark something as canceled? What is the 'it' being marked as canceled?
The last sentence is just gibberish.
Please try to make sense. It might help if you could post the directions you've been given in English, copied and pasted.