How do I set the field value (in PDF) to appear as an image?

Q: We are using PDFNet SDK to update text in PDF form fields, but now
would like to update/replace fields with Images. Does the PDFNet
support image replacing fields?
A: You can use PDFNet SDK to set form filed appearance to be an image
(or any combination of PDF graphical elements). As a starting point,
you may want to refer to the following PDFNet KB article:

How do I set image/PDF as a value of a button form field?