Question 1...
http://j-walk.com/ss/excel/tips/tip47.htm
"Filling a ListBox with Unique Items.

Question 2...
http://support.microsoft.com/kb/213748/en-us
"How to Populate One Listbox Based Upon Another Listbox
--
Jim Cone
San Francisco, USA
http://www.realezsites.com/bus/primitivesoftware



"Alex"
wrote in message
what I am trying to do is create two combo boxes, where the second box
loads itself with options that depend upon what was selected in the
first combo box.

-snip
make the entries non duplicative

-snip-
I would really appreciate any help anyone may be able to give me on
these issues.
Thanks in advance!
-Alex