RtlULongMult - NtDoc

#ifndef _NTINTSAFE_H_INCLUDED_
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM | WINAPI_PARTITION_GAMES)

//
// ULONG multiplication
//
_Must_inspect_result_
__inline
NTSTATUS
RtlULongMult(
    _In_ ULONG ulMultiplicand,
    _In_ ULONG ulMultiplier,
    _Out_ _Deref_out_range_(==, ulMultiplicand * ulMultiplier) ULONG* pulResult)
{
    ULONGLONG ull64Result = UInt32x32To64(ulMultiplicand, ulMultiplier);
    
    return RtlULongLongToULong(ull64Result, pulResult);
}

#endif
#endif
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