IW51/52 Before saving the notification

Hi All,

I have a requirement on the Tasks creation in IW51/52 . Like,When 1 task is created and when click on Complete by selecting that task,We need to get the popup with 2 radio buttons .If we click on 1st radio button,The 1st task need to be auto closed and at the same time,another task need to be created .Could anyone please suggest me where to write the piece of code .

Thanks in Advance

With Regards

Srilikhitha