ExtremeGTX has created a new ‘hello world’ sample for UEFI developers on github. It is currently is centered around boot manager features. If you are new to UEFI application development, and want to learn how to do Windows-centric ‘OS-present’ code to talk to UEFI, this is another sample you may want to look at. It is new, so perhaps give the author some more time to add more to the library.

ExtemeGTX: If you are reading this, please consider upgrading to a newer version of Microsoft Visual C++, I think you’re still using something from a pre-Y2K era, which generates ugly template code, not to mention decades of bugs and newer features to help you write better code, the whole point of an IDE. And fewer conversion pain for others that try to compile your code with a copy of Visual Studio 201x. Thank you!

https://github.com/ExtremeGTX/Win32-UEFILibrary