SYSTEMTIME

The SYSTEMTIME structure represents a date and time using individual members for the month, day, year, weekday, hour, minute, second, and millisecond.

Members

wYear

Specifies the current year. The year must be greater than 1601.

Windows XP, Windows Server

The year cannot be greater than 30827.

wMonth

Specifies the current month; January = 1, February = 2, and so on.

wDayOfWeek

Specifies the current day of the week; Sunday = 0, Monday = 1, and so on.

wDay

Specifies the current day of the month.

wHour

Specifies the current hour (0-23).

wMinute

Specifies the current minute (0-59).

wSecond

Specifies the current second (0-59).

wMilliseconds

Specifies the current millisecond (0-999).

Remarks

It is not recommended that you add or substract values from this structure to obtain relative times. Instead, you should do the following:

Convert the SYSTEMTIME structure to a FILETIME structure using the SystemTimeToFileTime function.
Copy the resulting FILETIME structure to a ULARGE_INTEGER structure.
Use standard 64-bit arithmetic on the ULARGE_INTEGER value or cast a variable of FILETIME type to the __int64 type:
```
FILETIME WriteTime1, WriteTime2;

if(*(__int64*) & WriteTime1 == *(__int64*) & WriteTime2)
 ...
```