BetaWiki:Featured article/2018-12

Windows 1.0 Development Release #5 is a pre-release build of Windows 1.0. This build is the fifth in the Development Release series, intended to help application developers design and develop their applications to work with Windows. According to, it was compiled on 1984-11-01. It is the earliest leaked build of Windows so far.

By default, this build is installed to, with development resources in. Resources are stored in .res files outisde of the executables and will also open their associated program when double-clicked. The overall UI design philosophy was not finalized yet, which can be clearly seen in dialogs - some use a menu bar rather than OK and Cancel buttons. Also included are several mockup applications, namely Chart, Graph, PPDemo, Sample and Template, along with their source code.