Pro WPF in C# 2010: Windows Presentation Foundation in .NET 4

16.4. Frame-Based Animation

Along with the property-based animation system, WPF provides a way to create frame-based animation using nothing but code. All you need to do is respond to the static CompositionTarget.Rendering event, which is fired to get the content for each frame. This is a far lower-level approach, which you won't want to tackle unless you're sure the standard property-based animation model won't work for your scenario (for example, if you're building a simple side-scrolling game, creating physics-based animations, or modeling particle effects such as fire, snow, and bubbles).

The basic technique for building a frame-based animation is easy. You simply need to attach an event handler to the static CompositionTarget.Rendering ...