David-
>>Is the rowsource for the CBO the same as the source for the textboxes?

>If you mean is the rowsource for the CBO the same as the controlsource for the textboxes the answer is yes, same alias. However, the rowsource only specifies the key field.

Hm. I like cbo's to use a SQL-Select or AddItem rowsource so that record pointer changes in the cbo's rowsource don't impact the record pointer for the other (textbox) controls.

>I notice that the interactivechange event does not fire when I use an ENTER
Do you mean you issue a KEYBOARD? Then, yes, the programmatic change is fired. You can simply put a call to the interactivechange() method in the programmaticchange method.