如何实现从WMI动态获取CPU温度

本人通过VB编程从WMI获取CPU温度，但却是静止不动的，有高手说是必须在某些系统信息发生改变时才会刷新数据。但打开SPEEDFAN温度检测后，WMI里的CPU温度数据却动态地刷新着。并且是准确地。所以在这请教高手解释这里面的原因。

附上VB代码

Private Sub Command1_Click()

    MsgBox "CPU 溫度 : " & CPU_Temperature & " °C"

End Sub

Private Function CPU_Temperature() As Integer

    Dim WMIsvc As Object

    Dim CltItems As Object, CltItem As Object

    Dim Q As String

    Set WMIsvc = GetObject("winmgmts:\\.\root\WMI")

    Q = "SELECT * FROM MSAcpi_ThermalZoneTemperature"

    Set CltItems = WMIsvc.ExecQuery(Q, , 48)

    For Each CltItem In CltItems

        CPU_Temperature = CltItem.CurrentTemperature

    Next

    CPU_Temperature = (CPU_Temperature - 2732) / 10

    Set CltItem = Nothing

    Set CltItems = Nothing

    Set WMIsvc = Nothing

End Function

是不是这个wmi数据没有刷新。

http://www.pudn.com/downloads217/sourcecode/windows/system/detail1023415.html
可以参考这个的实现