RtlQueryInformationActiveActivationContext - NtDoc

#ifndef _NTRTL_H
#ifdef PHNT_INLINE_ACTIVE_ACTIVATION_CONTEXT

// private
FORCEINLINE
NTSTATUS
NTAPI
RtlQueryInformationActiveActivationContext(
    _In_ ACTIVATION_CONTEXT_INFO_CLASS ActivationContextInformationClass,
    _Out_writes_bytes_(ActivationContextInformationLength) PVOID ActivationContextInformation,
    _In_ SIZE_T ActivationContextInformationLength,
    _Out_opt_ PSIZE_T ReturnLength
    )
{
    return RtlQueryInformationActivationContext(
        RTL_QUERY_INFORMATION_ACTIVATION_CONTEXT_FLAG_USE_ACTIVE_ACTIVATION_CONTEXT,
        NULL,
        0,
        ActivationContextInformationClass,
        ActivationContextInformation,
        ActivationContextInformationLength,
        ReturnLength
        );
}

#endif
#endif
View code on GitHub

#ifndef _NTRTL_H
#ifdef PHNT_INLINE_ACTIVE_ACTIVATION_CONTEXT
// ...
#else

// private
NTSYSAPI
NTSTATUS
NTAPI
RtlQueryInformationActiveActivationContext(
    _In_ ACTIVATION_CONTEXT_INFO_CLASS ActivationContextInformationClass,
    _Out_writes_bytes_(ActivationContextInformationLength) PVOID ActivationContextInformation,
    _In_ SIZE_T ActivationContextInformationLength,
    _Out_opt_ PSIZE_T ReturnLength
    );

#endif
#endif
View code on GitHub