Thank you very much.. I still had another question in the combo box also.
a.Why there are times that the displayvalue becomes Special Characters?
b.I placed my combobox inside a grid. When I move to second row and return to the previous row. It replaced the combobox value into a "" value?

It is probably something in your code because this is not native behavior.

Go to the tools and utilities page of my web site and download my conference session entitled "How to put a Combo in a Grid". It has a white paper that explains how to do this properly and lots of code samples.

Regards,
Marcia G. Akins
Tightline Computers, Inc.