static extern bool QueryPerformanceFrequency(out long frequency);

If you are interested in this API you are probably also looking for the QueryPerformanceFrequency API.

    Private Shared Function QueryPerformanceFrequency(ByRef lpPerformanceFreq As Long) As Boolean

    If Not QueryPerformanceFrequency(freq) Then

    private static extern bool QueryPerformanceFrequency(out long lpPerformanceFreq);

        if (!QueryPerformanceFrequency(out freq)) {

static extern bool QueryPerformanceFrequency(out long frequency);

Shared Function QueryPerformanceFrequency(ByRef lpFrequency As Long) As Boolean

public static extern bool QueryPerformanceFrequency(out long freq);