I sometimes see questions on Stack Overflow which ask
"How <technology> works?"
I always thought that this is an incorrect use and it should be
"How does <technology> work?"
However, I now see such a sentence on a website of a company I'm a customer of. They have a FAQ
- How CppDepend licensing works?
So my question is: is that correct use of English? If so, why? What's the rule behind it?