Phil,
Next time don't use a name like comboboxes, a lot of (most) users use
Outlook Express to see newsgroups. It will search to a subject like yours
and your message will be connected to an older one, therefore in your
subject "Needs help with 3 comboboxes for 3 tables" will set this appart.
Your question, Yes that is easy to do.
What you need is 3 dataviews.
With rowfilters wich you make the datasources of your comboboxes.
When combobox 1 changes, you use the indexchange event of that combobox,
toset the rowfilter of the dataview to the selectedtext (or value) and so on
to the next combobox.
http://msdn.microsoft.com/library/de...iltertopic.asp
It is as well possible with datareleations, however to get it fire you need
again the same procedure and therefore I see no benefit for that.
I hope this helps?
Cor