关于GetFileTime函数使用的问题

[PagiHi]

使用GetFileTime函数得到的时间是FILETIME结构，其内部成员都是DWORD型，如何将其转换成我们日常使用的时间呀？如某年某月某日何时何分等。

[smallfool]

Remarks
To convert a FILETIME structure into a time that is easy to display to a user, use the FileTimeToSystemTime function.

It is not recommended that you add and subtract values from the FILETIME structure to obtain relative times. Instead, you should

Copy the resulting FILETIME structure to a ULARGE_INTEGER structure.
Use normal 64-bit arithmetic on the ULARGE_INTEGER value.
Note Not all file systems can record creation and last access time and not all file systems record them in the same manner. For example, on Windows NT FAT, create time has a resolution of 10 milliseconds, write time has a resolution of 2 seconds, and access time has a resolution of 1 day (really, the access date). On NTFS, access time has a resolution of 1 hour. Therefore, the GetFileTime function may not return the same file time information set using the SetFileTime function. Furthermore, FAT records times on disk in local time. However, NTFS records times on disk in UTC, so it is not affected by changes in time zone or daylight saving time.
FileTimeToSystemTime
The FileTimeToSystemTime function converts a 64-bit file time to system time format.

BOOL FileTimeToSystemTime(
CONST FILETIME *lpFileTime, // file time to convert
LPSYSTEMTIME lpSystemTime // receives system time
);
Parameters
lpFileTime
[in] Pointer to a FILETIME structure containing the file time to convert to system date and time format.
The FileTimeToSystemTime function only works with FILETIME values that are less than 0x8000000000000000. The function fails with values equal to or greater than that.

lpSystemTime
[out] Pointer to a SYSTEMTIME structure to receive the converted file time.
Return Values
If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks
As noted above, the function fails for FILETIME values that are equal to or greater than 0x8000000000000000.

MAPI: For more information, see Syntax and Limitations for Win32 Functions Useful in MAPI Development.

[PagiHi]

smallfool:
有没有直接判断两个时间前后的函数呀？
谢谢你！