?? clstiming.cls
字號:
VERSION 1.0 CLASS
BEGIN
MultiUse = -1 'True
Persistable = 0 'NotPersistable
DataBindingBehavior = 0 'vbNone
DataSourceBehavior = 0 'vbNone
MTSTransactionMode = 0 'NotAnMTSObject
END
Attribute VB_Name = "clsTiming"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option Explicit
Private Declare Function QueryPerformanceCounter Lib "KERNEL32" (lpPerformanceCount As Currency) As Long
Private Declare Function QueryPerformanceFrequency Lib "KERNEL32" (lpFrequency As Currency) As Long
Private m_Frequency As Currency
Private m_Start As Currency
Private m_Now As Currency
Private m_Available As Boolean
Private Sub Class_Initialize()
m_Available = (QueryPerformanceFrequency(m_Frequency) <> 0)
If Not m_Available Then
Debug.Print "Performance Counter not available"
End If
End Sub
Friend Function Elapsed() As Double
QueryPerformanceCounter m_Now
If m_Available Then
Elapsed = 1000 * (m_Now - m_Start) / m_Frequency
End If
End Function
Friend Sub Reset()
QueryPerformanceCounter m_Start
End Sub
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