Populating a UserForm ListBox with all Open workbooks

I am trying to populate a ListBox in a UserForm with all the open workbooks on a desktop.

Here is what I have so far. I think I'm getting caught at the ".AddItems" portion.

Any and all help is greatly appreciated.

Private Sub CommandButton1_Click()

WorkbookChoiceUserForm.Show

End Sub

Private Sub UserForm_Initialize()

    Dim wb As Workbook
    Dim wbs As Workbooks
    Dim wbText As String

    Set wbs = Application.Workbooks

    'Fill WkbkListBox
    With WkbkListBox
        For Each wb In wbs
            wbText = wb.Name
            WkbkListBox.AddItem wbText
        Next wb
    End With

End Sub

Private Sub ContinueButton_Click()
    
    Dim wbChoice As Workbook
    wbChoice = WkbkListBox.Value
    'Wanted to check my work, but not getting this far yet.
    Cells(1, 1).Value = wbChoice

End Sub