VB中Timer的间隔最大时间是多少?

2025-03-09 09:42:21
推荐回答(2个)
回答(1):

VB中Timer的间隔最大为65535ms。

Timer控件是一个定时发生某个动作的控件,它有一个重要属性Interval,这个值设定每个多长时间执行一次动作,单位是毫秒,还有一个重要事件是Timer,双击Timer控件即可自动产生这个事件的框架,在这个框架里面写入每隔Interval毫秒就要执行的代码动作。

可以通过编程实现长时间:

Private   Sub   Form_Load()             

Timer1.Interval   =   60000             

Timer1.Enabled   =   True     

End   Sub     

Private   Sub   Timer1_Timer()             

Static   s_Minutes   As   Long             

s_Minutes   =   s_Minutes   +   1             

If   s_Minutes   =   60   Then                     

s_Minutes   =   0                     

Debug.Print   "一小时到了"            

End   If     End   Sub  

回答(2):

Interval最大为65535 毫秒
但是可以通过编程实现长时间
Private Sub Form_Load()
Timer1.Interval = 60000
Timer1.Enabled = True
End Sub

Private Sub Timer1_Timer()
Static s_Minutes As Long

s_Minutes = s_Minutes + 1
If s_Minutes = 60 Then
s_Minutes = 0
Debug.Print "一小时到了"
End If
End Sub

或者代用API实现长达 49 天以上
'模块中代码
Dim lTimerId As Long
Private Declare Function SetTimer Lib "user32" (ByVal hWnd As Long, ByVal nIDEvent As Long, ByVal uElapse As Long, ByVal lpTimerFunc As Long) As Long

Private Declare Function KillTimer Lib "user32" (ByVal hWnd As Long, ByVal nIDEvent As Long) As Long

Private Sub TimerProc(ByVal lHwnd As Long, ByVal lMsg As Long, ByVal lTimerId As Long, ByVal lTime As Long)

Dim lResult As Long
lResult = StopTimer(lTimerId)
Call InsertYourProcessNameHere
'code to be executed after interval
End Sub

Public Sub StartTimer(lInterval As Long) 'convert interval to milliseconds prior to passing
lTimerId = SetTimer(0, 0, lInterval, AddressOf TimerProc)
End Sub

Public Function StopTimer(lTimerId As Long) As Long
'must pass the TimerId returned by SetTimer
StopTimer = KillTimer(0, lTimerId)
End Function

'调用方式
Call StartTimer(5000) '5 seconds

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