List Box Control (Forms) [Access 2003 VBA Language Reference]
The list box control displays a list of values or alternatives. In many cases, it's quicker and easier to select a value from a list than to remember a value to type. A list of choices also helps ensure that the value that's entered in a field is correct.
The list in a list box consists of rows of data. Rows can have one or more columns, which can appear with or without headings.
Note This control should not be confused with the Dynamic HTML list box control used on a data access page. For information about a list box control on a data access page, see List Box Control (Data Access Pages).
If a multiple-column list box is bound, Microsoft Access stores the values from one of the columns.
You can use an unbound list box to store a value that you can use with another control. For example, you could use an unbound list box to limit the values in another list box or in a custom dialog box. You could also use an unbound list box to find a record based on the value you select in the list box.
If you don't have room on your form to display a list box, or if you want to be able to type new values as well as select values from a list, use a combo box instead of a list box.