Windows Longhorn build 4050 (private/lab06 demo.031020-1959)

Windows Longhorn build 4050 (private/lab06_demo.031020-1959) is a private build of Windows Longhorn. This build's black and white screenshots were found in a patent for the "multi-mode window system". The files for the Sticky Notes component of this build were leaked by ReflectiaX on 10 October 2020.