Chapter 27, "New Gizmos," discusses the advantages of visual gizmos, which is Cooper's term for previews. His advice: "Show; don't tell."
While this book is primarily about icon design, it will also help you learn how to communicate visually. These are important skills when designing iconic and abstract previews.
Chapter 13, "Printing and Print Previewing," has a detailed description of how print previewing is implemented in MFC.