_ETW_GUID_TYPE

Windows 10 | 2016 2009 20H2 (October 2020 Update) x64
Windows 10 | 2016 2104 21H1 (May 2021 Update) x64
Windows 10 | 2016 2110 21H2 (November 2021 Update) x64
//0x4 bytes (sizeof)
enum _ETW_GUID_TYPE
{
    EtwTraceGuidType = 0,
    EtwNotificationGuidType = 1,
    EtwGroupGuidType = 2,
    EtwGuidTypeMax = 3
};