How to make an arbitrary Microsoft FILETIME?

I would like to make an arbitrary Microsoft FILETIME. The algorithm is more important than the Microsoft programming language.

For example if today is June 2 2016, I would like to calculate the FILETIME at midnight June 2016.

Any help is greatly appreciated.

[EDIT June 2 2016 5:09 P.M Here is the program which is causing me headaches:

Microsoft SYSTEMTIME in nanoseconds is 1467432000. Microsoft FILETIME in nanoseconds for the same date-time stamp is 1470186549.

Here is my algorithm. May I ask what I did wrong?]

void _wapi_time_t_to_filetime(time_t timeval, FILETIME* filetime)
{
    int64_t ticks;

    ticks = ((int64_t)timeval * 10000000) + 116444736000000000ULL;
    filetime->dwLowDateTime = ticks & 0xFFFFFFFF;
    filetime->dwHighDateTime = ticks >> 32;
}


int64_t FileTime_to_POSIX(FILETIME ft)
{
    FILETIME localFileTime;
    FileTimeToLocalFileTime(&ft, &localFileTime);
    SYSTEMTIME sysTime;
    FileTimeToSystemTime(&localFileTime, &sysTime);
    struct tm tmtime = { 0 };
    tmtime.tm_year = sysTime.wYear - 1900;
    tmtime.tm_mon = sysTime.wMonth; // -1;
    tmtime.tm_mday = sysTime.wDay;
    tmtime.tm_hour = sysTime.wHour;
    tmtime.tm_min = sysTime.wMinute;
    tmtime.tm_sec = sysTime.wSecond;
    tmtime.tm_wday = 0;
    tmtime.tm_yday = 0;
    tmtime.tm_isdst = -1;
    time_t ret = mktime(&tmtime);
    return ret;
}


int _tmain(int argc, _TCHAR* argv[])
{
    SYSTEMTIME stUTCStart, stUTCFinish;
    FILETIME  ftStart, ftFinish;

    int64_t elapsedNanoSeconds(0);

    GetSystemTime(&stUTCStart);
    printf("%d nanoseconds\n", ConvertSYSTEMTIMEToNanoseconds(stUTCStart));

    struct tm tmtime = { 0 };
    tmtime.tm_year = 2016 - 1900;
    tmtime.tm_mon = 6; 
    tmtime.tm_mday = 2; 
    tmtime.tm_hour = stUTCStart.wHour;
    tmtime.tm_min = stUTCStart.wSecond;
    tmtime.tm_sec = stUTCStart.wSecond;
    tmtime.tm_wday = stUTCStart.wDayOfWeek;
    tmtime.tm_yday = 132;
    tmtime.tm_isdst = -1;
    time_t ret = mktime(&tmtime);
    _wapi_time_t_to_filetime(ret, &ftStart);

    printf("%d nanoseconds\n", FileTime_to_POSIX(ftStart));
    return 0;


  }

Here is the answer I found in the mono source code.

void _wapi_time_t_to_filetime (time_t timeval, WapiFileTime *filetime)
{
    guint64 ticks;

    ticks = ((guint64)timeval * 10000000) + 116444736000000000ULL;
    filetime->dwLowDateTime = ticks & 0xFFFFFFFF;
    filetime->dwHighDateTime = ticks >> 32;
}