property Items.FindItemData (UserData as Variant, [StartIndex as Variant]) as Long
Finds the item giving its data.

TypeDescription
UserData as Variant A variant value that indicates the value being searched
StartIndex as Variant A long expression that indicates the index of the item where the searching starts
Long A long expression that indicates the index of the item found, or -1 if the item is not found.
Use the FindItemData property to search for an item giving its extra-data. Use the ItemData property to associate an extra data to an item. Use the FindItem property to locate an item given its caption.