Form with List Box picker -- you can pick one or all Projects to show employees for.

There are 2 list boxes
1. one for projects to choose from and
2. one for projects that have been picked

you can move one item at a time by double-clicking on it or with > or <

you can move all items with >> or <<

Once items are chosen, click Show Query -- Access creates a query showing records from the Employees table that are working on projects in the Projects table -- and opens it up.