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Working with a Pop-Up Form

The NotInList technique just described employs the pop-up form. When the user opts to add the new payment method, the frmPaymentMethods form displays modally. This halts execution of the code in the form that loads the frmPaymentMethods form (in this case, the frmPayments form). The frmPaymentMethods form is considered a pop-up form because the form is modal, it uses information from the frmPayments form, and the frmPayments form reacts according to whether the OK or Cancel button is selected.

Adding Items to a Combo Box or List Box at Runtime

Prior to Access 2002, it was very difficult to add and remove items from list boxes and combo boxes at runtime. Access 2002, Access 2003, and Access 2007 list boxes and combo boxes support two powerful methods that make it easier to programmatically manipulate these boxes at runtime. The AddItem method allows you to easily add items to a list box or a combo box. The RemoveItem method allows you to remove items from a combo box or a list box.

Handling Multiple Selections in a List Box

List boxes have a Multiselect property. When set to True, this property lets the user select multiple elements from the list box. Your code can then evaluate which elements are selected and perform some action based on the selected elements. The frmReportSelection form, found in the CHAP10EX database, illustrates the use of a multiselect list box. The code under the Click event of the Run Reports button looks like that shown in Listing 10.2.

This material orginally appeared in Alison Balter's book Mastering Microsoft Office Access 2007 Development. Reprinted here by author's permission.

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