Tanks Trendsetter, for responding so quickly, I was able to resolve my problem using the rowsource property of the list box in as query criteria box using the expression builder. it looks something like this:
[Forms]![formName]![ListBoxName].Rowsource
And then on my form I have a cmd button that when the user clicks it will open the query and find the record based on the item(s) in the list box. I use a for loop to iterate thru the list box.