displaying a column from lookup table upon entering values in a datagrid column

[Marivic]

Hi all,

I have a datagrid with 3 columns (userid, username, userpass). Is it possible that upon entering userid (the user will tab to the next column) , I wanted to lookup to a particular table to validate if the userid exists and if exists, display the value of username.

Any help would be greatly appreciated.

Marivic