timeGetTime
The
timeGetTime function retrieves the system time, in milliseconds. The system time is the
time elapsed since Windows was started.
DWORD timeGetTime(VOID);
Parameters
This function does not take parameters.
Return Values
Returns the system time, in milliseconds.
Remarks
The only difference between this function and the
timeGetSystemTime function is that
timeGetSystemTime uses the
MMTIME structure to return the system time. The
timeGetTime function has less overhead than
timeGetSystemTime.
Note that the value returned by the
timeGetTime function is a DWORD value. The return value wraps around to 0 every 2^32
milliseconds, which is about 49.71 days.This can cause problems in code that
directly uses the
timeGetTime return value in computations, particularly where the value is used to control
code execution. You should always use the difference between two
timeGetTime return values in computations.
Windows NT: The default precision of the
timeGetTime function can be five milliseconds or more, depending on the machine. You can
use the
timeBeginPeriod and
timeEndPeriod functions to increase the precision of
timeGetTime. If you do so, the minimum difference between successive values returned by
timeGetTime can be as large as the minimum period value set using
timeBeginPeriod and
timeEndPeriod. Use the
QueryPerformanceCounter and
QueryPerformanceFrequency functions to measure short time intervals at a high resolution,
Windows 95: The default precision of the
timeGetTime function is 1 millisecond. In other words, the
timeGetTime function can return successive values that differ by just 1 millisecond. This
is true no matter what calls have been made to the
timeBeginPeriod and
timeEndPeriod functions.
See Also
timeGetSystemTime,
MMTIME,
timeGetTime,
timeBeginPeriod,
timeEndPeriod,
QueryPerformanceCounter,
QueryPerformanceFrequency
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