In this chapter, we learned about the tooltip, upload, video, and editor widgets. These widgets are commonly used in web applications. We took a look at customizing the tooltip styling so that it stands out from the rest of the UI and loading AJAX content in it. We've seen how to upload multiple files with Wijmo while showing a progress bar, a video widget, and the Ribbon style editor. In the next chapter, you will learn how to combine Wijmo with Knockout to build interactive user interfaces.