1.         We are now ready to add a control for the products that a customer has purchased or is interested in purchasing. For this we need what is called a Multi-Selection Picklist, which allows you to select more than one item in that list.

2.         But first we need a label. Add one with a caption Products.

3.          Now we need the List Box control. Select this from the Control Toolbox:

4.         Drag a List Box onto the form, and then widen it a bit, as well as increasing the height by stretching the bottom of the box downwards:

5.         Right click on the List Box and select Properties. Instead of creating a new field we are going to use an existing field called Categories. You select this field by clicking on Choose Field, selecting Frequently-used Fields, and then choosing the Categories field. This is a special type of field called a Keywords field. It allows one to store multiple values in the field, separated by commas. These values can be grouped in a View so that one can see the contact appearing for each keyword that is displayed in the list.

6.         Under Possible values, enter the list of products that are applicable, separated by commas:

7.         Click on OK to complete the exercise of adding the List Box.