How to get Windows version?

Question

C++ / C#

Interested in getting a version of Windows, such as Windows 7 or Windows 8, or Windows 8.1.
How to implement it?

Answer 1

#include <windows.h>

int main()
{
    auto dwVersion = GetVersion();
    // Версия, например 8
    auto dwMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
    // Вторая цифра версии, например 1
    auto dwMinorVersion = (DWORD)(HIBYTE(LOWORD(dwVersion)));
}