Listbox with Multiselection used in Query
by Duane Hookom
This sample demonstrates how a multiselect listbox can be used as the criteria in a query. A generic function is used to return a True or False depending on if a field value is selected in a listbox on a form.
There are two list boxes in the demo: one is bound to a numeric field and the other a text field.
While this solution works great for smaller tables, it may not be the best solution for tables with 1000s of records.
You can find the sample here: http://www.rogersaccesslibrary.com/forum/forum_posts.asp?TID=17