You can set the case sensitivity of a listbox interactively or programmatically.
Complete the following steps to interactively indicate how the listbox treats upper and lowercase characters when you select items by typing their initial letters.
On the front panel, right-click the listbox.
Select Keyboard Mode from the shortcut menu and select from the following options:
If you select Case Sensitive, an item is selected only if the uppercase and lowercase letters typed in by the user exactly match the item.
If you select Case Insensitive, case is ignored. If you select System Default (the default setting for a listbox), the listbox behaves the same as other listboxes for a given platform. Windows and Macintosh The listbox is case insensitive. UNIX The listbox is case sensitive.
Complete the following steps to programmatically set the case sensitivity of a listbox using Property Node for Keyboard Mode.