A spin button control (WC_SPINBUTTON window class) is a visual component that gives users quick access to a finite set of data by letting them select from a scrollable ring of choices. Because the user can see only one item at a time, a spin button should be used only with data that is intuitively related, such as a list of the months of the year, or an alphabetic list of cities or states. This chapter explains when and how to use spin buttons in PM applications.