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<DIV class=tit>VB中DoEvents的注意事项</DIV>
<DIV class=date>2007-08-22 10:15</DIV>
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<P>VB中DoEvents的注意事项</P>
<P></P>
<P>对与再大循环里 加入 DoEvents却是可以使应用程序响应其他程序，但是
DoEvents也会很大程度上影响循环的速度，所以一般情况我这样用 <BR>If GetInputState Then
DoEvents<BR>虽然多了个判断语句，但速度上确快了很多 </P>
<P>比较以下代码代码就知道了速度的差别 </P>
<P>Private Declare Function GetInputState Lib "user32" () As
Long<BR>Private Declare Function GetTickCount Lib "kernel32" () As
Long</P>
<P>Private Sub Command1_Click()<BR> Dim s As
Long<BR> s =
GetTickCount<BR> For i = 1 To
1000000<BR>
DoEvents<BR>
Next<BR> MsgBox GetTickCount - s<BR>End
Sub</P>
<P>Private Sub Command2_Click()<BR> Dim s As
Long<BR> s =
GetTickCount<BR> For i = 1 To
1000000<BR> If
GetInputState Then DoEvents<BR>
Next<BR> MsgBox GetTickCount - s<BR>End
Sub<BR></P>
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<TD class=cnt style="PADDING-LEFT: 20px"><SPAN class=date>2008-01-23 08:24
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<DIV class=desc style="OVERFLOW: hidden; WORD-BREAK: normal">If
GetInputState Then DoEvents<BR>好象不能下次循环啊<BR>郁闷的很
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