iTextSharp: SplitLate/SplitRows?

I have an issue where I have a table (PdfPTable) that may extend past the length of the page. I have tried looking up how to "split" a table onto more than one page but iTextSharp is pretty poorly documented in this area. Does anyone know how to do this without choosing an arbitrary Y position on the page and telling it to split if it's there?

I looked into the SplitLate and SplitRows properties, but there's no documentation on what these do. EDIT They do nothing.

Thanks!

EDIT

I'm looking to cut the table in half widthwise as the table will always fit the width of the page. This is to say that I want the rows that don't fit vertically to extend to the next page below it.

EDIT2

Here's some code:

Public Sub BuildPrintableDocument
    Dim doc As New Document(PageSize.LETTER, 0, 0, 0, BOTTOM_MARGIN)
    Dim writer As PdfWriter = PdfWriter.GetInstance(doc, _
        New FileStream("invoice.pdf", FileMode.Create)

    Dim footer As New HeaderFooter(New Phrase("www.columbussupply.com", _
        footerFont), False)
    footer.Border = Rectangle.NO_BORDER
    footer.Alignment = HeaderFooter.ALIGN_CENTER
    doc.Footer = footer

    doc.Open()

....

Dim items As PdfPTable = NewItemTable()
Dim count As Integer = 0
    For Each oi As OrderItem In TheInvoice.Items
        If oi.Status <> OrderItem.OrderItemStatus.Cancelled Then
            Dim qty As New PdfPCell(New Phrase(oi.Quantity, mainFont))
            qty.HorizontalAlignment = Element.ALIGN_CENTER
            qty.Padding = ITEMS_PADDING

            '...instantiate 3 other cells here (removed for repetitiveness)'

            items.AddCell(qty)
            items.AddCell(desc)
            items.AddCell(price)
            items.AddCell(total)
        End If
    Next

    items.WriteSelectedRows(0, -1, LEFT_MARGIN, GetItemsStartY, _
        writer.DirectContent)
End Sub


Pr