How do you have data displayed in first combo box, It controlls what the
second combo box shows and display 3 columns across.
ca1358

ca1358,
You need to have a list of items in combo#1, and for each item there,
there would be a corresponding list of items which would be displayed
in combo#2. The code to load combo#2 can be attached to an event in
combo#1, like OnChange.
That is the concept, you have to supply the details.
Cheers,
Alan