How can I use Windows to create an OS X El Capitan or macOS Sierra USB flash drive installer from the disk image (.dmg) file downloaded from Apple?

There are many posts on the Internet where instructions are given for creating OS X USB installers by using the TransMac and other such applications on a Windows machine. Many of these posts assume one is starting with a disk image (.dmg) file made from an existing OS X USB flash drive installer. An InstallMacOSX.dmg file for OS X El Capitan , can be downloaded from the Apple website How to download macOS . While this file can be restored to a flash drive, the result is not a working OS X El Capitan USB installer. The same is true for the macOS Sierra file InstallOS.dmg file, which can be downloaded from the same Apple website. How can I use Windows to create an OS X El Capitan or macOS Sierra USB flash drive installer from a .dmg file, which can be downloaded from Apple?