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For anybody interested in the use-case underlying this article, mainly disabling peripheral displays in a multi-monitor setup, this is already built into Windows via the Win+P hotkey. It's also possible to turn off all displays by reassigning the functions of the computer's physical power/sleep buttons in Control Panel -> Power Options.

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This is not the same at all, you are pretty much turning the screen off with that

Isn't that the point? What's the benefit of blacking-out a display instead of putting it in no-signal standby?

This is covered in the article:

> Turning them off will cause Windows to spasm for several seconds and throw all your current window positioning out of whack.

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