vb函数使用(高分求解）

呵呵 楼主没看懂 Example 是啥意思~~

添加一个类模块~代码如下 记得将类模块名改为clsWaitableTimer
Option Explicit

Private Type FILETIME

dwLowDateTime As Long
dwHighDateTime As Long

End Type

Private 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 Long

Private mlTimer As Long

Private Sub Class_Terminate()

On Error Resume Next

If mlTimer <> 0 Then CloseHandle mlTimer
End Sub

Public 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

dblDelay = CDbl(MilliSeconds) * 10000#
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
lBusy = MsgWaitForMultipleObjects(1, mlTimer, False, INFINITE, QS_ALLINPUT&)

DoEvents
Loop Until lBusy = WAIT_OBJECT_0

CloseHandle mlTimer
mlTimer = 0

Exit Sub

ErrHandler:
Err.Raise Err.Number, Err.Source, "[clsWaitableTimer.Wait]" & Err.Description
End Sub

'===================窗体代码如下 功能 延时5秒打印出字体

Private mobjWaitTimer As clsWaitableTimer

Private Sub RunProcess()

Set mobjWaitTimer = New clsWaitableTimer

Do

If mbWorkToDo Then
'Call ProcessWork
Else
mobjWaitTimer.Wait (5000) ' 延时5秒 自行更改
End If

Loop Until Not mbStop

Set mobjWaitTimer = Nothing
End Sub

Private Sub Command1_Click()
RunProcess
Print "有没有延时成功呢？"
RunProcess
Print "应该有吧"
End Sub

写的那么详细了 还有啥不懂啊 而且还给了调用的例子 晕

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
'

英语还是很重要的