11 Date/Time API Function

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FILETIME Structure

FILETIME-type variables hold a 64-bit value identifying a time and date (usually one associated with a file). The structure holds a time by specifying the number of 100-nanosecond intervals since January 1, 1601. The 64-bit data is divided into the two member values, each holding either the high-ord...
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SYSTEMTIME Structure

SYSTEMTIME-type variables hold an exact date and time, down to the millisecond. There are two ways this structure stores dates: absolute and relative. Absolute dates (the default, regular format) are "normal" dates, such as January 15, 1998 or December 25, 2001. Relative dates are dates such as "the...
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SystemTimeToFileTime

SystemTimeToFileTime converts a time and date stored in a SYSTEMTIME structure to an identical time and date stored in a FILETIME structure. The former structure provides a easier way to access a date and time, whereas the latter is used by Windows to identify times and dates associated with files. ...
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TIME_ZONE_INFORMATION

TIME_ZONE_INFORMATION-type variables hold information about the system's selected time zone. The two arrays in the structure are actually strings, each element holding the ASCII codes for each character (the end of the string is marked by a NULL character, ASCII code 0). For more information about h...
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LocalFileTimeToFileTime

LocalFileTimeToFileTime converts a time from local time (time according to the computer's current time zone) to UTC time (also known as Greenwich Mean Time). The source and target times are stored in FILETIME format. The function returns 1 if successful, or 0 if an error occured. ...
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GetSystemTime

GetSystemTime returns the system's time and date -- in Coordinated Universal Time (UTC, also known as Greenwich Mean Time (GMT) or Zulu time) instead of in the local time zone. This means that the time and date this function gives you probably won't match what the computer's clock tells you. This is...
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FileTimeToSystemTime

FileTimeToSystemTime converts a time and date stored in a FILETIME structure to an identical time and date stored in a SYSTEMTIME structure. The latter structure provides a easier way to access a date and time, whereas the former is used by Windows to identify times and dates associated with files. ...
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GetLocalTime

GetLocalTime returns the system's time and date. The various features of the time and date (month, day, hour, minute, second, etc.), down to the millisecond, are sorted in the variable passed as lpSystemTime! Windows considers "local time" to be the system's current time. ...
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GetTimeZoneInformation

GetTimeZoneInformation reads the computer's current time zone settings. Since Windows handles all of the system clock settings, there usually isn't a need for other programs to use this information. The information is put into the variable passed as lpTimeZoneInformation. The function returns 0 if a...
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FileTimeToLocalFileTime

FileTimeToLocalFileTime converts a time from UTC time (also known as Greenwich Mean Time) to "local time" (inside the computer's selected time zone). The source and target times are stored in FILETIME structures. The function returns 1 if successful, or 0 if an error occurs. ...
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GetDateFormat

The GetDateFormat function formats a date as a date string for a specified locale. The function formats either a specified date or the local system date....
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