Several keys that are defined in `winuser.h` were added after Keyman
defined its vkeys and so are not documented in the Keyman docs. This
change adds underscores before and after to mark them as being internal.
It's still useful to have them in the source code because it makes the
mapping between Linux keys and Keyman vkeys easier.
Addresses code review comment.
Keyman makes it possible for you to type in any language on Windows, macOS, Linux, iPhone, iPad, Android tablets and phones, and even instantly in your web browser. Create keyboard layouts with Keyman Developer and share them with the community in the keyboards repository. The Keyman Community have already contributed keyboard layouts for over 2,000 languages!
License
Copyright (c) SIL Global.
Keyman is an open source project distributed under the MIT license.