Work Item - Onclick - Inbasket

Hi all... I have small doubt regarding work item or Workflow Task (At Inbasket). Using WF ,Lifecycle and ItemType.................. One Document is submitted  for a review. Now, the document state is "Submitted" Until the Workflow task clicked on Inbasket by assignee it remains "Submitted". If assignee opens the WF Activity completion sheet, the document state is changed into "In Review". After that he may "reject" or "approve". Is it possible?