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ListBoxObject.Itemdata (RowIndex)

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  • Latest Post Latest Post by vb5prgrmr

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Short primer that fills the gaps in the thread (answering and responding to ):

ListBox.ItemData is a per-row numeric slot you can use for a hidden ID (database key, array index, enum value). It is not the display text — that comes from the List/Column property. Both the visible list and the ItemData use zero-based row indexes (the first row is index 0; ListIndex is -1 when nothing is selected). (learn.microsoft.com)

Practical pattern (safe with Sorted = True): add the display string, then record the ID at the index the control actually inserted — that index is available as NewIndex. Example usage in VB6:

' populate and attach a numeric ID to each item
lstProducts.AddItem Products(i).Name
lstProducts.ItemData(lstProducts.NewIndex) = Products(i).ID

Use NewIndex instead of ListCount-1 if the list is sorted. (faculty.elgin.edu)

Reading the ID back (single or multi-select): for single-selection read ItemData(ListIndex) after checking ListIndex <> -1. For multi-select iterate the ItemsSelected (or test Selected(i) in a loop) and call ItemData for each selected index. When you need richer data, keep a parallel array/UDT and store that array index in ItemData (common VB6 pattern). (learn.microsoft.com)

Notes and cautions: ItemData is intended for 32‑bit integer values (use Long for IDs). It’s not for storing strings/objects directly — use ItemData as an index into your own storage when more info is needed. SendKeys is unrelated to ListBox.ItemData and should be avoided for this purpose; inspect the control at runtime (Immediate window) and read the VB6 help (F1) as suggested for hands‑on learning. (xxxmen.github.io)

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Member Avatar for vb5prgrmr

Use the additem method put a few items into a listbox. Press CTRL+BREAK and use the immediate window to find your answers.

?List1.List(1)
?List1.ItemData(1)
List1.Selected(1) = True
?List1.ListIndex

Now, you will notice that list and itemdata return different string because one is zero based and the other is one based.


Good Luck

Member Avatar for sotvisal

Hi friend i still don't get what you mean about Itemdata and Method SendKeys could you please give me some things?

Member Avatar for vb5prgrmr

And what does sendkeys have to do with explanations of a listbox's properties/methods/events?

Add list box to form, make sure it is selected, press F1, and read all about it.


Good Luck

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