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How can I get the Windows system time with millisecond resolution?
If the above is not possible, then how can I get the operating system start time? I would like to use this value together with timeGetTime() in order to compute a system time with millisecond resolution.
Thank you in advance.
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GetTickCount function (sysinfoapi. h) - Win32 apps. Retrieves the number of milliseconds that have elapsed since the system was started, up to 49.7 days.
4 High Resolution Time This specification defines an interface that provides the current time in sub-millisecond resolution and such that it is not subject to system clock skew or adjustments.
A millisecond (ms or msec) is one thousandth of a second and is commonly used in measuring the time to read to or write from a hard disk or a CD-ROM player or to measure packet travel time on the Internet. For comparison, a microsecond (us or Greek letter mu plus s) is one millionth (10-6) of a second.
Try this article from MSDN Magazine. It's actually quite complicated.
Implement a Continuously Updating, High-Resolution Time Provider for Windows
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