_IO_NMISOURCE

Windows 10 | 2016 1903 19H1 (May 2019 Update) x64
Windows 10 | 2016 1909 19H2 (November 2019 Update) x64
Windows 10 | 2016 2004 20H1 (May 2020 Update) x64
Sorry, but such structure doesn't exist in chosen version of the kernel.