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Excel/need VBA solution for listbox control

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Question
Hello,

This should be simple but for the life of me I can't figure out what I've done wrong.

I have written some basic code that allows the user to select a range of cells, click an "add" button which then transfers the cell contents into a userform listbox.  I then have a button on the userform that hides the form to allow the user to make additional selections, click the Add button, and have the values added to the listbox (appended to the end of the data that was originally selected).  It supposed to function almost like an "Add to Cart" / "Continue shopping" type form.

Here's the problem; I can get it to add the data to the listbox and to return to the sheet.  But the second time through, the selections just replace the original list instead of adding to it.  Im looking at my code and seeing that I'm overwriting my variable but Im a VBA newbie and am not sure how to fix it.  I've tried to create a new variable that combines the two ranges but haven't been able to get it to work.

Here is what I have so far:

Private Sub UserForm_Activate()
Dim rng As Range
Dim nrng As Range
If Listboxitems.ListCount = 0 Then
Set rng = Selection
Listboxitems.List = rng.Cells.Value
Else
Set nrng = Selection
Listboxitems.List = nrng.Cells.Value
End If
End Sub


I keep searching online but all I can find is all the ways to populate a list box, but not how to add items to an already existing listbox list.  

Thanks!

Answer
leigh,

I would use additem.  I assume your selection will be a single column


Private Sub UserForm_Activate()
Dim rng As Range


Set rng = Selection
for each cell in rng
 Listboxitems.additem cell.Value
Next

End Sub

--
Regards,
Tom Ogilvy

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Tom Ogilvy

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Selected as an Excel MVP by Microsoft since 1999. Answering Excel questions in Allexperts since its inception in 2001. Able to answer questions on almost all aspects of Excel's internal capabilities. If seeking a VBA solution, please specify that in your question itself so I give you the answer you want. [Excel has weak protection - if you are distributing an application, I don't answer questions on how to protect your project from your users.]

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Master of Science (MS) degree Operations Research (ORSA)

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Microsoft MVP in Excel.

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