(Unicode C++) Date/Time Expires Within N Seconds/Minutes/Hours/Days

Demonstrates the how to tell if a date/time is within N seconds, minutes, hours, or days of the current system time.

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#include <CkDateTimeW.h>

void ChilkatSample(void)
    {
    CkDateTimeW dt;

    // Set to the current system date/time.
    dt.SetFromCurrentSystemTime();
    wprintf(L"Now: %s\n",dt.getAsTimestamp(true));

    // Add 10 minutes, making the date 10 minutes in the future.
    dt.AddSeconds(600);
    wprintf(L"10 minutes from now: %s\n",dt.getAsTimestamp(true));

    // Is the date/time within 10 seconds of expiration (i.e. within 10 seconds of now)?
    bool b = dt.ExpiresWithin(10,L"seconds");
    wprintf(L"Expires within 10 seconds: %d\n",b);

    // Does the date/time expire within 5 minutes?
    b = dt.ExpiresWithin(5,L"minutes");
    wprintf(L"Expires within 5 minutes: %d\n",b);

    // Does the date/time expire within 15 minutes?
    b = dt.ExpiresWithin(15,L"minutes");
    wprintf(L"Expires within 15 minutes: %d\n",b);

    // Does the date/time expire within 1 hour?
    b = dt.ExpiresWithin(1,L"hour");
    wprintf(L"Expires within 1 hour: %d\n",b);

    // Does the date/time expire within 1 day?
    b = dt.ExpiresWithin(1,L"day");
    wprintf(L"Expires within 1 day: %d\n",b);

    // Output:

    // 	Now: 2017-05-05T23:48:00-0500
    // 	10 minutes from now: 2017-05-05T23:58:00-0500
    // 	Expires within 10 seconds: False
    // 	Expires within 5 minutes: False
    // 	Expires within 15 minutes: True
    // 	Expires within 1 hour: True
    // 	Expires within 1 day: True
    }