Properties of a selectbox on a form include "Required". When I choose this, it doesn't seem to matter whether the user submitting a form actually selects a value or not. When a new form is launched, the selectbox (shown as a drop-down selection box) always shows the first selectbox value..and if the form is submitted, it takes that value as though the user selected it. I tried creating a blank value (no data name and no data value) and added it to the top of the list, but the portal just takes that as though the user selected it. How do you force this "Required" check to work for a selectbox?