RtlIpv6StringToAddressW - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTRTL_H

NTSYSAPI
NTSTATUS
NTAPI
RtlIpv6StringToAddressW(
    _In_ PCWSTR AddressString,
    _Out_ PCWSTR *Terminator,
    _Out_ PIN6_ADDR Address
    );

#endif

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This function is documented in Windows SDK.