The textboxes are bound to a table. The source of list box is a separate table. here is what I tried, but it does not work:
SELECT List_CRNA1.CRNA_CC, not Exists (select unscheduled_pto_1, unscheduled_pto_2, unscheduled_pto_3, unscheduled_pto_4, unscheduled_pto_5, unscheduled_pto_6
from...