EtwEventWriteEx - NtDoc

#ifndef _NTWMI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

NTSYSAPI
ULONG
NTAPI
EtwEventWriteEx(
    _In_ REGHANDLE RegHandle,
    _In_ PCEVENT_DESCRIPTOR EventDescriptor,
    _In_ ULONG64 Filter,
    _In_ ULONG Flags,
    _In_opt_ LPCGUID ActivityId,
    _In_opt_ LPCGUID RelatedActivityId,
    _In_ ULONG UserDataCount,
    _In_reads_opt_(UserDataCount) PEVENT_DATA_DESCRIPTOR UserData
    );

#endif
#endif
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