BOOLEAN
RtlTimeFieldsToTime (
    IN PTIME_FIELDS TimeFields,
    OUT PLARGE_INTEGER Time
    )

/*++

Routine Description:

    This routine converts an input Time Field variable to a 64-bit NT time
    value.  It ignores the WeekDay of the time field.

Arguments:

    TimeFields - Supplies the time field record to use

    Time - Receives the NT Time corresponding to TimeFields

Return Value:

    BOOLEAN - TRUE if the Time Fields is well formed and within the
        range of time expressible by LARGE_INTEGER and FALSE otherwise.

--*/

{
    ULONG Year;
    ULONG Month;
    ULONG Day;
    ULONG Hour;
    ULONG Minute;
    ULONG Second;
    ULONG Milliseconds;

    ULONG ElapsedDays;
    ULONG ElapsedMilliseconds;

    //
    //  Load the time field elements into local variables.  This should
    //  ensure that the compiler will only load the input elements
    //  once, even if there are alias problems.  It will also make
    //  everything (except the year) zero based.  We cannot zero base the
    //  year because then we can't recognize cases where we're given a year
    //  before 1601.
    //

    Year         = TimeFields->Year;
    Month        = TimeFields->Month - 1;
    Day          = TimeFields->Day - 1;
    Hour         = TimeFields->Hour;
    Minute       = TimeFields->Minute;
    Second       = TimeFields->Second;
    Milliseconds = TimeFields->Milliseconds;

    //
    //  Check that the time field input variable contains
    //  proper values.
    //

    //
    //  Year 30827 check: Time (in 100ns units) is stored in a
    //  64-bit integer, rooted at 1/1/1601.
    //
    //  2^63 / (10^7 * 86400) = 10675199 days
    //  10675199 / 146097 = 73 400-year chunks, 10118 days
    //  10118 / 1461 = 6 4-year chunks, 1352 days
    //  1352 / 365 = 3 years, some residual days
    //  1600 + 73*400 + 6*4 + 3 = 30827 is last year fully
    //  supported.
    //
    //  I'm guessing it's undesirable to support part of the
    //  year 30828.
    //

    if ((TimeFields->Month < 1)                      ||
        (TimeFields->Day < 1)                        ||
        (Year < 1601)                                ||
        (Year > 30827)                               ||
        (Month > 11)                                 ||
        ((CSHORT)Day >= MaxDaysInMonth(Year, Month)) ||
        (Hour > 23)                                  ||
        (Minute > 59)                                ||
        (Second > 59)                                ||
        (Milliseconds > 999)) {

        return FALSE;

    }

    //
    //  Compute the total number of elapsed days represented by the
    //  input time field variable
    //

    ElapsedDays = ElapsedYearsToDays( Year - 1601 );

    if (IsLeapYear( Year - 1600 )) {

        ElapsedDays += LeapYearDaysPrecedingMonth[ Month ];

    } else {

        ElapsedDays += NormalYearDaysPrecedingMonth[ Month ];

    }

    ElapsedDays += Day;

    //
    //  Now compute the total number of milliseconds in the fractional
    //  part of the day
    //

    ElapsedMilliseconds = (((Hour*60) + Minute)*60 + Second)*1000 + Milliseconds;

    //
    //  Given the elapsed days and milliseconds we can now build
    //  the output time variable
    //

    DaysAndFractionToTime( ElapsedDays, ElapsedMilliseconds, Time );

    //
    //  And return to our caller
    //

    return TRUE;
}

再请教一下,都有那些API和C/C++库函数调用了这个函数