I am sorry but I did not fully explain the problem.
1. I don't want to save the document . The uidoc.Save in my example was a typo.
2. The document is opened in edit mode.
3. If lookupDoc.Manager(0) is blank , then i want to display a message and after the user click OK in the message box, close the document without saving.
I was looking for the easiest way to do this. I exhausted all my ideas.
Thanks for your response and brain power.