Q: How can I retrieve the text color, border line color from a free-
text annot? the Annot.GetColor() always return the \'fill\' color.
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A: With the current version of PDFNet (i.e. v5 -
http://www.pdftron.com/pdfnet/downloads.html) you can use freetext.Get/
SetTextColor() to change the color of text and freetext.Get/
SetLineColor() to set the border color. With older versions of PDFNet
you can also access these properties, however you need to understand
low-level APIs and read the ISO32000 specification.