#define cszNxCoreDateFromYMD "sNxCoreDateFromYMD"
    typedef void (__stdcall *NxCoreDateFromYMD) (NxDate* pnxDate);

    void DateFromYMD(
        NxDate*                         pnxDate
        );

#define _CRT_SECURE_NO_WARNINGS
#include <windows.h>
#include <stdio.h>

#include <NxCoreAPI.h>
#include <NxCoreAPI_class.h>

NxCoreClass nxCoreClass;

const char* days[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};

int HowLongUntilNewYears(const NxDate& d)
{
    NxDate nxDateToday = d;

    nxCoreClass.DateFromYMD(&nxDateToday);

    NxDate nxDateNewYears;

    nxDateNewYears.Year  = d.Year + 1;
    nxDateNewYears.Month = 1;
    nxDateNewYears.Day   = 1;

    nxCoreClass.DateFromYMD(&nxDateNewYears);

    int nDays = nxDateNewYears.NDays - nxDateToday.NDays;

    printf("Tape date is: %s %d/%.2d/%.2d (%d day of the year) -- it's %d days until New Year\n",
        days[d.DayOfWeek], (int) d.Year, (int) d.Month, (int) d.Day, (int) d.DayOfYear, nDays);

    return nDays;
}

int HowLongUntilFriday(const NxDate& d)
{
    NxDate nxDateToday = d;

    nxCoreClass.DateFromYMD(&nxDateToday);

    int nDays = NxDOW_FRIDAY - (nxDateToday.NDays % 7);
    if (nDays == 0)
    {
        printf("Tape date is: %s %d/%.2d/%.2d -- it's FRIDAY!\n",
            days[d.DayOfWeek], (int) d.Year, (int) d.Month, (int) d.Day);
        return nDays;
    }

    if (nDays < 0)
    {
        nDays += 7; // must be saturday
    }

    printf("Tape date is: %s %d/%.2d/%.2d -- %d days until Friday!\n",
        days[d.DayOfWeek], (int) d.Year, (int) d.Month, (int) d.Day, nDays);

    return nDays;
}

int __stdcall nxCoreCallback(const NxCoreSystem* pNxCoreSys, const NxCoreMessage* pNxCoreMessage)
{
    switch (pNxCoreMessage->MessageType)
    {
        case NxMSG_STATUS:
        {
            switch (pNxCoreSys->Status)
            {
                case NxCORESTATUS_RUNNING:
                {
                    static bool needToPrint = true;
                    if (needToPrint && pNxCoreSys->nxTime.MsOfDay > 0)
                    {
                        needToPrint = false;
                        HowLongUntilNewYears(pNxCoreSys->nxDate);
                        HowLongUntilFriday(pNxCoreSys->nxDate);
                    }

                    break;
                }
            }
        }
    }

    return NxCALLBACKRETURN_CONTINUE;
}

int main(int argc, char** argv)
{
    if (!nxCoreClass.LoadNxCore("NxCoreAPI.dll") &&
        !nxCoreClass.LoadNxCore("C:\\Program Files\\Nanex\\NxCoreAPI\\NxCoreAPI.dll"))
    {
        fprintf(stderr, "Can't find NxCoreAPI.dll\n");
        return -1;
    }

    nxCoreClass.ProcessTape(argv[1], 0, NxCF_EXCLUDE_CRC_CHECK, 0, nxCoreCallback);

    return 0;
}