XAML Unleashed

RichEditBox

RichEditBox is a version of TextBox that enables the display and editing of rich-formatted text. The reason it’s called RichEditBox rather than the more obvious RichTextBox is that it’s a thin wrapper over rich text formatting exposed by the Windows Runtime, which is a whole different set of APIs than the XAML-specific rich text formatting APIs. The “rich edit” term also has a long history in Win32.

The implication of this is that interacting with RichEditBox feels a lot less like interacting with a typical XAML control and instead has an API style that betrays its Windows Runtime roots. RichEditBox has a Document property of type ITextDocument rather than BlockCollection. The property is read-only, and there’s no public class that ...