[VZ]

> Well, let's verify that… https://i.imgur.com/uHfjoUs.png No, they're not.

Sorry, I don't know what is this supposed to prove, but I can definitely assure you that all the mentioned controls, and many others, are exactly native controls under the 3 first tier platforms (MSW, GTK and macOS).

> Do you have any proof?

Proof of absence of something is hard to make, all I can say is that you can go through MSDN, GTK and Cocoa documentation to convince yourself.