62.txt

介绍VB里的各种控件的使用方法,窗口控制,图像编程以及OCX等内容,还提供了一个API集供参考.

延时函数
定义函数：
Public Function Delay(Mins%, Secs%, Optional ByRef StopFlag) As Long
Dim EndOfDelay
EndOfDelay = DateAdd("n", Mins, Now)
EndOfDelay = DateAdd("s", Secs, EndOfDelay)
Delay = 0
Do While (Now < EndOfDelay)
DoEvents
If Not IsMissing(StopFlag) Then
If StopFlag Then
Delay = 1
StopFlag = False
Exit Do
End If
End If
Loop
End Function
使用例子：

Dim StopTheTimer As Boolean

Private Sub Command1_Click() '开始延时
Dim lRetval&
lRetval = Delay(1, 5, StopTheTimer)
If lRetval = 0 Then
MsgBox "时间到!"
Else
MsgBox "取消延时!"
End If
End Sub
Private Sub Command2_Click() '取消延时
StopTheTimer = True
End Sub