Originally Posted by
ArviLaanemets
In general, AfterUpdate event of first control (NB! You have to differ between fields, which are table things, and controls, which are elements of form. Controls have a table field as source, or they have an expression instead.) rewrites the Row Source of another combo box/list box. And of course, an OnCurrent event of form rewrites also the Row source of second combo box whenever another record is activated. There were sevaral postings about this in last couple of months - look for cascading controls/combo boxes/whatever.