coredll is for smart devices, not desktop Windows. Therefore, this information only applies to code using the .NET Compact Framework. To see if information for QueryPerformanceFrequency in other DLLs exists, click on Find References to the right.

Summary

This function retrieves the frequency of the high-resolution performance counter if one is provided by the OEM.

C# Signature:

[DllImport("coredll.dll", SetLastError=true)]
static extern bool QueryPerformanceFrequency(out long frequency);

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

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Sample Code:

/// <summary>

/// Queries the performance frequency.

/// </summary>

/// <param name="freq">The frequency used by this highly robust measurement counter</param>

/// <returns>A boolean indicating success or failure</returns>

[DllImport("Kernel32.dll")]

public static extern bool QueryPerformanceFrequency(out long freq);

Alternative Managed API:

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Documentation

QueryPerformanceFrequency on MSDN

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