I have a form that features a drop down list that uses sqldatasource1 to automatically have the user selected. I'm wanting to add linkbuttons (A-Z) so when the user selects the given linkbutton only users who's last name begins with that letter is visible in the drop down list. I have stored procedure written and created sqldatasource2 for this but I'm unsure of how to code it to reflect what I'm wanting it to do.