Editing the value of the Query Criteria programmatically

I am not sure how to this. I have a table with two columns:

1 AAA
2 ABA
3 AAA
4 BBB

In my form I have two ListBox. In one of the ListBox I display “AAA, ABA” in a column format. What I am trying to do is: when the user picks on the AAA the second ListBox would display “1” and “2” in a ListBox format.

What I was thinking to do is to create a query that will filter ‘AAA’ form it’s original location and display everything filtered in the second ListBox.

What do you all think. Perhaps you know a better way to do this.

Also, if I decide to do it the way above, how would I go about feeding the ‘AAA’ into my Query programmatically?