給妳壹個例子吧。
'以下在TEvent.Cls
Option Explicit
Const INFINITE = &HFFFF
Const ERROR_ALREADY_EXISTS = 183&
Const WAIT_TIMEOUT = &H102
Private Declare Function CreateEvent Lib "kernel32" Alias "CreateEventA" _(lpEventAttributes As Any, ByVal bManualReset As Long, _ByVal bInitialState As Long, ByVal lpName As String) As Long
Private Declare Function SetEvent Lib "kernel32" (ByVal hEvent As Long) As Long
Private Declare Function ResetEvent Lib "kernel32" (ByVal hEvent As Long) As Long
Private Declare Function PulseEvent Lib "kernel32" (ByVal hEvent As Long) As Long
Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, _ByVal dwMilliseconds As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private hEvent As Long
Private m_TimeOut As Long
Public Function Create(ByVal EventName As String) As Long
If EventName = "" Then
Create = -1
Exit Function
End If
If hEvent <> 0 Then
Create = 0
Exit Function
End If
Dim i As Long
hEvent = CreateEvent(ByVal 0, 1, 0, EventName)
If i = 0 Then
Create = 1
End If
End Function
Public Sub DelEvent()
Call CloseHandle(hEvent)
hEvent = 0
End Sub
Public Sub Signal()
Call SetEvent(hEvent)
End Sub
Public Sub PulseSignal()
Call PulseEvent(hEvent)
End Sub
Public Sub UnSignal()
Call ResetEvent(hEvent)
End Sub
Public Function ChkSignaled()
If hEvent = 0 Then
ChkSignaled = -1
Exit Function
End If
Dim i As Long
i = WaitForSingleObject(hEvent, m_TimeOut)
If i = 0 Then
ChkSignaled = 1
Else
If i = WAIT_TIMEOUT Then
ChkSignaled = 0
Else
ChkSignaled = -1
End If
End If
End Function
Public Property Get TimeOut() As Long
TimeOut = m_TimeOut
End Property
Public Property Let TimeOut(ByVal vNewValue As Long)
If vNewValue < 0 Then
vNewValue = 0
End If
m_TimeOut = vNewValue
End Property
Private Sub Class_Initialize()
m_TimeOut = INFINITE
End Sub
Private Sub Class_Terminate()
Call DelEvent
End Sub
'以下在Form 需3個Command Button 壹個label
Option Explicit
Dim aa As New TEvent
Private Sub Command1_Click()
aa.Signal
End Sub
Private Sub Command2_Click()
aa.UnSignal
End Sub
Private Sub Command3_Click()
Dim i As Long
aa.TimeOut = 5000
i = aa.ChkSignaled
Label1.Caption = "等待中"
DoEvents
If i = 1 Then
Label1.Caption = "綠燈了"
Else
Label1.Caption = "Time Out了"
End If
End Sub
Private Sub Form_Load()
aa.Create ("MyEvent")
End Sub
還不清楚可以加我，壹般晚上在的。