Desktop Composition Engine
From BetaArchive Wiki
The Desktop Composition Engine was the desktop compositor in builds 3706-4029 of Windows "Longhorn". It provided numerous visual effects, such as twirling windows while they were minimized. The compositor is present in Milestone 3 builds 3683, 3706, 3713, and 3718. It is unstable in Milestone 4 builds, 4008, 4011, and 4015.
One of the most well known visual effects of the DCE is present in certain 4015 and 4018 builds.
Before the development reset of Windows "Longhorn", it became known as Desktop Window Manager.
