Using Multiple View Ports in DirectX 8

This is an example of how to use multiple view ports in DirectX 8. A view port can be very useful in some cases, for example if you've written a car racing game and want to implement a rear view mirror. From the MSDN .NET Framework Developer Center, "A view port is a rectangle that defines how a 3-D scene is rendered into a 2-D window. A view port also defines an area on a device into which objects are rendered".