How can I programmatically update the fields, like FileName, in the pageheader in an MS Word 2007 document?

Question

The following code only updates the fields outside the page headers.

ActiveDocument.Fields.Update

I also asked the question on MSDN Forums

Answer 1

OK, I found it.

ActiveDocument.Sections(1).Headers(wdHeaderFooterPrimary).Range.Fields.Update

Answer 2

Geoffrey's answer did not work for me for some reason.

Eventually I got the fields updated in my footers using a sledgehammer and a stick of dynamite like so:--

        wDoc.PrintPreview();
        wDoc.ClosePrintPreview();