Need combo box to be dependent on another, with duplicate values

[ArchonUltimatum]

I just learned Access for school and already found a project to work on. There are just a couple of things I am hung up on. I have a form with two combo boxes. I need to be able to select one or more values in the first box, and the selections in the second box need to be linked with the corresponding values in the first.

That sounded confusing, but this is the best way I can describe it:
A to 1,
B to 2,
C to 1,
D to 1
Where the letters are the values in the first box, and the numbers are the second.

If anyone has some time to help me out with this and maybe a couple more issues, I would greatly appreciate it!

[June7]

Combobox allows only one item to be selected unless it is bound to a multi-value field. You don't want that.

You seem to describe cascading or dependent combo/list boxes. Review: http://www.datapigtechnologies.com/f...combobox2.html