My combo box [named categories] in table 3 [orders table] is based on table 1 [categories table]. My combo box [named products] in table 3 [orders table] is based on table 2 [products table]. This is what I want: When you select a category name in the first combo box, the second combo box is filtered to list only the product names for that category. I found a process for that here using code: http://support.microsoft.com/default.aspx?scid=kb;en-us;209576 It doesn't explain it. I have been able to duplicate it in my orders form. It only works in combo boxes in forms. Questions: Is there are way to do it in the tables? Is there a way to do it without code? What the heck does "me !" mean at the beginning of the code?