This short guide is only possible because of the Transmission, OpenSSL, curl and CMake developers' work.
Thanks to https://github.com/transmission/transmission-release-scripts/blob/master/build-windows.ps1 and https://build.transmissionbt.com/job/trunk-win32/arch=x64,label=pepito-win10/lastSuccessfulBuild/consoleText for showing the way.
The Transmission Project itself already provides [https://transmissionbt.com/download/](official builds w/ installer) which I install myself to have, among other things, an entry in the Windows services database for transmission-daemon.
I build my own transmission-daemon for these excellent patches: