Do While Timer < StartTime + 2! '这个常数就等待的时间(单位为秒) '其它函数 Loop'如果需要更精确的定时,使用GetTickCount函数Private Declare Function GetTickCount Lib "kernel32" Alias "GetTickCount" () As Long dim StartTime As Long StartTime=GetTickCountDo While GetTickCount<StartTime+1000& '这个常数就等待的时间(单位:毫秒) '其它操作 Loop
添加一类模块,名为 clsWaitableTimer'**************************************************************************** '人人为我,我为人人 '枕善居收藏整理 '发布日期:05/06/24 '描 述:定(延)时函数大比拼 '网 站:http://www.mndsoft.com/ 'e-mail:[email protected] 'OICQ : 88382850 Option Explicit '************************************** ' Name: clsWaitableTimer ' ' Description: This class encapsulate the WaitableTimer API functions to ' put the thread of your application to Sleep for a period of time. ' The benefit of a Waitable timer to the Sleep API is that your ' application will still be responsive to events, where Sleep ' will freeze your application for the set interval. ' ' Example: 'This is an example for idling your application ' Private mobjWaitTimer As clsWaitableTimer ' Private Sub RunProcess() ' Set mobjWaitTimer = New clsWaitableTimer ' Do ' If mbWorkToDo Then ' Call ProcessWork() ' Else ' mobjWaitTimer.Wait(5000) 'Wait for 5 seconds ' End If ' Loop Until Not mbStop ' Set mobjWaitTimer = nothing ' End Sub ' ' Revision History:Private Type FILETIME dwLowDateTime As Long dwHighDateTime As Long End TypePrivate Const WAIT_ABANDONED& = &H80& Private Const WAIT_ABANDONED_0& = &H80& Private Const WAIT_FAILED& = -1& Private Const WAIT_IO_COMPLETION& = &HC0& Private Const WAIT_OBJECT_0& = 0 Private Const WAIT_OBJECT_1& = 1 Private Const WAIT_TIMEOUT& = &H102& Private Const INFINITE = &HFFFF Private Const ERROR_ALREADY_EXISTS = 183& Private Const QS_HOTKEY& = &H80 Private Const QS_KEY& = &H1 Private Const QS_MOUSEBUTTON& = &H4 Private Const QS_MOUSEMOVE& = &H2 Private Const QS_PAINT& = &H20 Private Const QS_POSTMESSAGE& = &H8 Private Const QS_SENDMESSAGE& = &H40 Private Const QS_TIMER& = &H10 Private Const QS_MOUSE& = (QS_MOUSEMOVE Or QS_MOUSEBUTTON) Private Const QS_INPUT& = (QS_MOUSE Or QS_KEY) Private Const QS_ALLEVENTS& = (QS_INPUT Or QS_POSTMESSAGE Or QS_TIMER Or QS_PAINT Or QS_HOTKEY) Private Const QS_ALLINPUT& = (QS_SENDMESSAGE Or QS_PAINT Or QS_TIMER Or QS_POSTMESSAGE Or QS_MOUSEBUTTON Or QS_MOUSEMOVE Or QS_HOTKEY Or QS_KEY)Private Const UNITS = 4294967296# Private Const MAX_LONG = -2147483648#Private Declare Function CreateWaitableTimer Lib "kernel32" Alias "CreateWaitableTimerA" (ByVal lpSemaphoreAttributes As Long, ByVal bManualReset As Long, ByVal lpName As String) As Long Private Declare Function OpenWaitableTimer Lib "kernel32" Alias "OpenWaitableTimerA" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal lpName As String) As Long Private Declare Function SetWaitableTimer Lib "kernel32" (ByVal hTimer As Long, lpDueTime As FILETIME, ByVal lPeriod As Long, ByVal pfnCompletionRoutine As Long, ByVal lpArgToCompletionRoutine As Long, ByVal fResume As Long) As Long Private Declare Function CancelWaitableTimer Lib "kernel32" (ByVal hTimer As Long) Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long Private Declare Function MsgWaitForMultipleObjects Lib "user32" (ByVal nCount As Long, pHandles As Long, ByVal fWaitAll As Long, ByVal dwMilliseconds As Long, ByVal dwWakeMask As Long) As LongPrivate mlTimer As LongPrivate Sub Class_Terminate() On Error Resume Next If mlTimer <> 0 Then CloseHandle mlTimer End SubPublic Sub Wait(MilliSeconds As Long) On Error GoTo ErrHandler Dim ft As FILETIME Dim lBusy As Long Dim lRet As Long Dim dblDelay As Double Dim dblDelayLow As Double
If Err.LastDllError <> ERROR_ALREADY_EXISTS Then ft.dwLowDateTime = -1 ft.dwHighDateTime = -1 lRet = SetWaitableTimer(mlTimer, ft, 0, 0, 0, 0) End If
' Convert the Units to nanoseconds. dblDelay = CDbl(MilliSeconds) * 10000#
' By setting the high/low time to a negative number, it tells ' the Wait (in SetWaitableTimer) to use an offset time as ' opposed to a hardcoded time. If it were positive, it would ' try to convert the value to GMT. ft.dwHighDateTime = -CLng(dblDelay / UNITS) - 1 dblDelayLow = -UNITS * (dblDelay / UNITS - Fix(CStr(dblDelay / UNITS)))
If dblDelayLow < MAX_LONG Then dblDelayLow = UNITS + dblDelayLow
Do ' QS_ALLINPUT means that MsgWaitForMultipleObjects will ' return every time the thread in which it is running gets ' a message. If you wanted to handle messages in here you could, ' but by calling Doevents you are letting DefWindowProc ' do its normal windows message handling---Like DDE, etc. lBusy = MsgWaitForMultipleObjects(1, mlTimer, False, INFINITE, QS_ALLINPUT&) DoEvents Loop Until lBusy = WAIT_OBJECT_0
' Close the handles when you are done with them. CloseHandle mlTimer mlTimer = 0 Exit Sub
ErrHandler: Err.Raise Err.Number, Err.Source, "[clsWaitableTimer.Wait]" & Err.Description End Sub 窗体中这样使用 Dim objTimer As clsWaitableTimer Set objTimer = New clsWaitableTimer
StartTime = Timer
Do While Timer < StartTime + 2!
StartTime = Timer
Do While Timer < StartTime + 2! '这个常数就等待的时间(单位为秒) '其它函数
Loop'如果需要更精确的定时,使用GetTickCount函数Private Declare Function GetTickCount Lib "kernel32" Alias "GetTickCount" () As Long
dim StartTime As Long
StartTime=GetTickCountDo While GetTickCount<StartTime+1000& '这个常数就等待的时间(单位:毫秒)
'其它操作
Loop
'人人为我,我为人人
'枕善居收藏整理
'发布日期:05/06/24
'描 述:定(延)时函数大比拼
'网 站:http://www.mndsoft.com/
'e-mail:[email protected]
'OICQ : 88382850
Option Explicit
'**************************************
' Name: clsWaitableTimer
'
' Description: This class encapsulate the WaitableTimer API functions to
' put the thread of your application to Sleep for a period of time.
' The benefit of a Waitable timer to the Sleep API is that your
' application will still be responsive to events, where Sleep
' will freeze your application for the set interval.
'
' Example: 'This is an example for idling your application
' Private mobjWaitTimer As clsWaitableTimer
' Private Sub RunProcess()
' Set mobjWaitTimer = New clsWaitableTimer
' Do
' If mbWorkToDo Then
' Call ProcessWork()
' Else
' mobjWaitTimer.Wait(5000) 'Wait for 5 seconds
' End If
' Loop Until Not mbStop
' Set mobjWaitTimer = nothing
' End Sub
'
' Revision History:Private Type FILETIME
dwLowDateTime As Long
dwHighDateTime As Long
End TypePrivate Const WAIT_ABANDONED& = &H80&
Private Const WAIT_ABANDONED_0& = &H80&
Private Const WAIT_FAILED& = -1&
Private Const WAIT_IO_COMPLETION& = &HC0&
Private Const WAIT_OBJECT_0& = 0
Private Const WAIT_OBJECT_1& = 1
Private Const WAIT_TIMEOUT& = &H102&
Private Const INFINITE = &HFFFF
Private Const ERROR_ALREADY_EXISTS = 183&
Private Const QS_HOTKEY& = &H80
Private Const QS_KEY& = &H1
Private Const QS_MOUSEBUTTON& = &H4
Private Const QS_MOUSEMOVE& = &H2
Private Const QS_PAINT& = &H20
Private Const QS_POSTMESSAGE& = &H8
Private Const QS_SENDMESSAGE& = &H40
Private Const QS_TIMER& = &H10
Private Const QS_MOUSE& = (QS_MOUSEMOVE Or QS_MOUSEBUTTON)
Private Const QS_INPUT& = (QS_MOUSE Or QS_KEY)
Private Const QS_ALLEVENTS& = (QS_INPUT Or QS_POSTMESSAGE Or QS_TIMER Or QS_PAINT Or QS_HOTKEY)
Private Const QS_ALLINPUT& = (QS_SENDMESSAGE Or QS_PAINT Or QS_TIMER Or QS_POSTMESSAGE Or QS_MOUSEBUTTON Or QS_MOUSEMOVE Or QS_HOTKEY Or QS_KEY)Private Const UNITS = 4294967296#
Private Const MAX_LONG = -2147483648#Private Declare Function CreateWaitableTimer Lib "kernel32" Alias "CreateWaitableTimerA" (ByVal lpSemaphoreAttributes As Long, ByVal bManualReset As Long, ByVal lpName As String) As Long
Private Declare Function OpenWaitableTimer Lib "kernel32" Alias "OpenWaitableTimerA" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal lpName As String) As Long
Private Declare Function SetWaitableTimer Lib "kernel32" (ByVal hTimer As Long, lpDueTime As FILETIME, ByVal lPeriod As Long, ByVal pfnCompletionRoutine As Long, ByVal lpArgToCompletionRoutine As Long, ByVal fResume As Long) As Long
Private Declare Function CancelWaitableTimer Lib "kernel32" (ByVal hTimer As Long)
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long
Private Declare Function MsgWaitForMultipleObjects Lib "user32" (ByVal nCount As Long, pHandles As Long, ByVal fWaitAll As Long, ByVal dwMilliseconds As Long, ByVal dwWakeMask As Long) As LongPrivate mlTimer As LongPrivate Sub Class_Terminate()
On Error Resume Next
If mlTimer <> 0 Then CloseHandle mlTimer
End SubPublic Sub Wait(MilliSeconds As Long)
On Error GoTo ErrHandler
Dim ft As FILETIME
Dim lBusy As Long
Dim lRet As Long
Dim dblDelay As Double
Dim dblDelayLow As Double
mlTimer = CreateWaitableTimer(0, True, App.EXEName & "Timer" & Format$(Now(), "NNSS"))
If Err.LastDllError <> ERROR_ALREADY_EXISTS Then
ft.dwLowDateTime = -1
ft.dwHighDateTime = -1
lRet = SetWaitableTimer(mlTimer, ft, 0, 0, 0, 0)
End If
' Convert the Units to nanoseconds.
dblDelay = CDbl(MilliSeconds) * 10000#
' By setting the high/low time to a negative number, it tells
' the Wait (in SetWaitableTimer) to use an offset time as
' opposed to a hardcoded time. If it were positive, it would
' try to convert the value to GMT.
ft.dwHighDateTime = -CLng(dblDelay / UNITS) - 1
dblDelayLow = -UNITS * (dblDelay / UNITS - Fix(CStr(dblDelay / UNITS)))
If dblDelayLow < MAX_LONG Then dblDelayLow = UNITS + dblDelayLow
ft.dwLowDateTime = CLng(dblDelayLow)
lRet = SetWaitableTimer(mlTimer, ft, 0, 0, 0, False)
Do
' QS_ALLINPUT means that MsgWaitForMultipleObjects will
' return every time the thread in which it is running gets
' a message. If you wanted to handle messages in here you could,
' but by calling Doevents you are letting DefWindowProc
' do its normal windows message handling---Like DDE, etc.
lBusy = MsgWaitForMultipleObjects(1, mlTimer, False, INFINITE, QS_ALLINPUT&)
DoEvents
Loop Until lBusy = WAIT_OBJECT_0
' Close the handles when you are done with them.
CloseHandle mlTimer
mlTimer = 0
Exit Sub
ErrHandler:
Err.Raise Err.Number, Err.Source, "[clsWaitableTimer.Wait]" & Err.Description
End Sub
窗体中这样使用
Dim objTimer As clsWaitableTimer
Set objTimer = New clsWaitableTimer
cmdWaitTimer.Enabled = False
objTimer.Wait 5000 '这条语句等待 5 秒钟 cmdWaitTimer.Enabled = True
Set objTimer = Nothing