The value of this article is not so much the content, but its place on the DD menu. Take a second and click on the line above that invites you to the menu page and familiarize yourself with where this article is on the menu. If you use Telerik (Progressive) products, you'll need this soon enough ... and the benefit is being able to find it when you need it.
So...
This article will show some code examples for the Telerik Winforms CellFormatting event