Adding pictures to a form is a straightforward process, although the methods differ from those you used in Chapter 2 to add pictures to rich text box controls. Conventional picture and ink picture controls store the binary values of Graphics Interchange Format (GIF) files in elements of XML Schema’s base64Binary datatype. (Conventional picture controls can use most common graphics file types; ink picture controls are limited to GIF images.) Conventional picture controls also support linked images; ink picture controls don’t.
The Gory Details of Base64 Encoding
IETF RFC 2045, “Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies” (at www.ietf.org/rfc/rfc2045.txt) defines Base64 Content-Transfer-Encoding ...