l$ = pdf.GetPageLabel(id, page)
page
argument. This must be a number in
the range of 1 to the total number of pages in the document and the page must have
been previously loaded using pdf.LoadPage(). The PDF document specified by id
must have been previously opened using pdf.OpenDocument().
Note that page labels aren't always set. If there is no label for the page, an empty string is returned.