Retrieves the number of milliseconds that have elapsed since the system was started.
ULONGLONG WINAPI GetTickCount64(void);
The number of milliseconds.
The resolution of the GetTickCount64 function is limited to the resolution of the system timer, which is typically in the range of 10 milliseconds to 16 milliseconds. The resolution of the GetTickCount64 function is also affected by adjustments made by the GetSystemTimeAdjustment function.
If you need a higher resolution timer, use a multimedia timer or a high-resolution timer.
To obtain the time the system has spent in the working state since it was started, use the QueryUnbiasedInterruptTime function.
To compile an application that uses this function, define _WIN32_WINNT as 0x0600 or later. For more information, see Using the Windows Headers.
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Build date: 10/8/2009