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static extern int NtSetTimerResolution(int DesiredResolution, bool SetResolution, out int CurrentResolution );

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Declare Function NtSetTimerResolution Lib "ntdll.dll" (ByVal DesiredResolution as UInteger, ByVal SetResolution as Boolean, ByRef CurrentResolution as UInteger)

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NtSetTimerResolution(0.5, True, 0)

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Documentation

[NtSetTimerResolution] on MSDN

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Summary

The SetTimer API

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static extern IntPtr SetTimer(IntPtr hWnd, IntPtr nIDEvent, uint uElapse, TimerProc lpTimerFunc);

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static extern IntPtr SetTimer(IntPtr hWnd, IntPtr nIDEvent, uint uElapse, IntPtr lpTimerFunc);

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Public Shared Function SetTimer _

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Public Shared Function SetTimer _

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When using the version that takes a delegate make sure that the delegate is kept alive, i.e. there must be a managed reference to the delegate. Typically this means that after creating the delegate and before passing it to the SetTimer method you should asign it to some private field.

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Documentation

[SetTimer] on MSDN

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    public void SetTimer(long Interval)

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        public void SetTimer(long Interval)