一个延时过程,同时判断BlnCAOP和LonDelayLastS的值不满足条件退出延时,可是我一执行command1时,CPU占用100%,请问为什么会这样如何解决?
代码如下:
dim BlnCAOP as Boolean
dim LonDelayLastS as integerPrivate Sub Command1_Click()
LonDelayLastS = 200
ReReDelayJudge (300)
End SubPublic Sub ReReDelayJudge(Lon1 As Long)
Dim LonOldTime
LonOldTime = Timer
Do While Timer - Lon1 < LonOldTime And BlnCAOP = False And LonDelayLastS > 0
DoEvents
Loop
End Sub
代码如下:
dim BlnCAOP as Boolean
dim LonDelayLastS as integerPrivate Sub Command1_Click()
LonDelayLastS = 200
ReReDelayJudge (300)
End SubPublic Sub ReReDelayJudge(Lon1 As Long)
Dim LonOldTime
LonOldTime = Timer
Do While Timer - Lon1 < LonOldTime And BlnCAOP = False And LonDelayLastS > 0
DoEvents
Loop
End Sub
建议你用Timer控件,或者API函数
API中的SLEEP可以用,不过用上后,电脑像SLEEP了一样,哈,所以最好不要用
用记事本打开,贴入下面代码。
然后在工程中添加类....VERSION 1.0 CLASS
BEGIN
MultiUse = -1 'True
Persistable = 0 'NotPersistable
DataBindingBehavior = 0 'vbNone
DataSourceBehavior = 0 'vbNone
MTSTransactionMode = 0 'NotAnMTSObject
END
Attribute VB_Name = "WaitTimer"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option ExplicitPrivate 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 SubErrHandler:
Err.Raise Err.Number, Err.Source, "[clsWaitableTimer.Wait]" & Err.Description
End Sub
Private Declare Sub Sleep Lib "kernel32.dll" (ByVal dwMilliseconds As Long)Public Sub ReReDelayJudge(Lon1 As Long)
Dim LonOldTime
LonOldTime = Timer
Do While Timer - Lon1 < LonOldTime And BlnCAOP = False And LonDelayLastS > 0
DoEvents
sleep 1
Loop
End Sub
你贴的wait的例子,全局变量应该放到哪个地方判断?