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VB DoEvents 语句的API升级版
作者:JiaJia 日期:2008-02-04
引用内容Public Declare Function GetInputState Lib "user32" () As Long
Public Sub newDoEvents() '这个是比较简单,功能较少
If GetInputState() <> 0 then DoEvents
End Sub
'------------------------
Public Const QS_HOTKEY = &H80
Public Const QS_KEY = &H1
Public Const QS_MOUSEBUTTON = &H4
Public Const QS_MOUSEMOVE = &H2
Public Const QS_PAINT = &H20
Public Const QS_POSTMESSAGE = &H8
Public Const QS_SENDMESSAGE = &H40
Public Const QS_TIMER = &H10
Public 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)
Public Const QS_MOUSE = (QS_MOUSEMOVE Or QS_MOUSEBUTTON)
Public Const QS_INPUT = (QS_MOUSE Or QS_KEY)
Public Const QS_ALLEVENTS = (QS_INPUT Or QS_POSTMESSAGE Or QS_TIMER Or QS_PAINT Or QS_HOTKEY)
Public Declare Function GetQueueStatus Lib "user32" (ByVal qsFlags As Long) As Long
Public Function cGetInputState() '这个可以按自己的要求定义,接收到什么消息才DoEvents
Dim qsRet As Long
qsRet = GetQueueStatus(QS_HOTKEY Or QS_KEY Or QS_MOUSEBUTTON Or QS_PAINT)
if qsRet<>0 then DoEvents
End Function
'有了上面2个函数就不怕影响循环中的运算效率了
'它可以让你的程序循环速度比使用 DoEvents 更快
Ps:好像有人写过代码更短的，但是不是这个API，有时间测试一下到底哪个快。
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