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title: WEBBROWSER中模拟鼠标点击(SendMessagePostMessage)
author: Love02xp
date: 2020-08-09 13:04:17
category: [编程代码]
tags: [VC6,代码,学习]

WEBBROWSER中模拟鼠标点击(SendMessagePostMessage)

@TOC

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正文

在webbrowser中点击某链接网上几乎都是用document对象模拟点击，这个方法基本能应对一般的情况，但是例如广告联盟的点击XXX就有检测机制（不多解释，你们懂的）。所以完全模拟鼠标的点击事件就比较完美。于是我用了最常见的SendMessage。

接下来就要解决一个问题，webbrowser的句柄问题。从控件本身得到的句柄不是真正的浏览窗口的句柄，用SPY++看一下就能看出来，这里不贴图了。按照这个窗体的结构，用以下代码可以获取到网页的窗口的句柄。
'获得webbrowser的句柄
Private Function GetBrowserWindow(hWnd As Long) As Long

Dim lngHnd As Long
lngHnd = FindWindowEx(hWnd, 0, "Shell Embedding", vbNullString) '
lngHnd = FindWindowEx(lngHnd, 0, "Shell DocObject View", vbNullString)
lngHnd = FindWindowEx(lngHnd, 0, "Internet Explorer_Server", vbNullString)
GetBrowserWindow = lngHnd

End Function

然后就是网页元素的定位，向哪个坐标发送点击。这里用了DOM对象遍历来获取具体位置。都知道网页上一个元素有offsetLeft,offsetWidth,offsetHeight,offsetTop属性，但是都是相对容器来说的，所以可以通过遍历相加得到这个元素的绝对位置（这个绝对也是相对于网页浏览器窗口来说的。。）。于是代码如下：
Private Sub GetPos(objA As Object)

On Error Resume Next
adW = objA.offsetWidth
adH = objA.offsetHeight
adX = objA.offsetLeft
adY = objA.offsetTop
Set objA = objA.parentNode   '遍历结点 获取绝对位置
Do While Not (objA Is Nothing)
    adX = adX + objA.offsetLeft
    adY = adY + objA.offsetTop
    Set objA = objA.parentNode
Loop
txtX.Text = CStr(adX)
txtY.Text = CStr(adY)
'Debug.Print "X:" & adX, "Y:" & adY, "W:" & adW, "H:" & adH, "P:" & adPos

End Sub

好了，主要的问题分析完毕，我不多说废话了，直接贴代码看吧。

'获得webbrowser的句柄
Private Function GetBrowserWindow(hWnd As Long) As Long

Dim lngHnd As Long
lngHnd = FindWindowEx(hWnd, 0, "Shell Embedding", vbNullString) '
lngHnd = FindWindowEx(lngHnd, 0, "Shell DocObject View", vbNullString)
lngHnd = FindWindowEx(lngHnd, 0, "Internet Explorer_Server", vbNullString)
GetBrowserWindow = lngHnd

End Function

Private Function IsURL(objHTML As Object) As Boolean

On Error Resume Next

Dim strHTML As String, strURL As String

IsURL = False
strURL = LCase$(txtHost.Text)
strHTML = LCase$(objHTML.innerhtml)   '都转成小写

If InStr(strHTML, strURL) > 0 Then IsURL = True  '是这个域名 返回true

End Function

Private Sub GetPos(objA As Object)

On Error Resume Next

adW = objA.offsetWidth
adH = objA.offsetHeight
adX = objA.offsetLeft
adY = objA.offsetTop
Set objA = objA.parentNode   '遍历结点 获取绝对位置

Do While Not (objA Is Nothing)
    adX = adX + objA.offsetLeft
    adY = adY + objA.offsetTop
    Set objA = objA.parentNode
Loop

txtX.Text = CStr(adX)
txtY.Text = CStr(adY)
'Debug.Print "X:" & adX, "Y:" & adY, "W:" & adW, "H:" & adH, "P:" & adPos

End Sub

''获取坐标按钮点击事件
Private Sub cmdGetXY_Click()

On Error Resume Next

Dim objHTML As Object
Dim i       As Integer

If txtHost.Text = "" Then
    'MsgBox "不写域名，搞我呀。。。"
    Exit Sub
End If

txtX.Text = ""
txtY.Text = ""
adX = 0
adY = 0
adW = 0
adH = 0

For i = 0 To 9
    Set objHTML = webB.Document.GetElementByID("bdfs" & CStr(i))

    If Not (objHTML Is Nothing) Then
        If IsURL(objHTML) Then
            Set objHTML = webB.Document.GetElementByID("dfs" & CStr(i))
            adPos = 1   '右侧链接区
            Call GetPos(objHTML)
            Exit For
        End If
    End If

    Set objHTML = webB.Document.GetElementByID("400" & CStr(i))

    If Not (objHTML Is Nothing) Then
        If IsURL(objHTML) Then
            Set objHTML = webB.Document.GetElementByID("aw" & CStr(i - 1))
            adPos = 0
            Call GetPos(objHTML)
            Exit For
        End If
    End If

    Set objHTML = webB.Document.GetElementByID("300" & CStr(i))

    If Not (objHTML Is Nothing) Then
        If IsURL(objHTML) Then
            Set objHTML = webB.Document.GetElementByID("aw" & CStr(i - 1))
            adPos = 2
            Call GetPos(objHTML)
            Exit For
        End If
    End If

Next

'If adX = 0 And adY = 0 Then MsgBox "没有找到。。。"

Set objHTML = Nothing

End Sub

'''发送点击按钮点击事件
Private Sub cmdClick_Click()

On Error Resume Next
Dim x      As Long, y As Long
Dim intRnd As Integer

Randomize   '启动随机数

If adX = 0 And adY = 0 Then
    'MsgBox "没有找到链接你也点。。。"
    Exit Sub
End If

wbHwnd = GetBrowserWindow(Me.hWnd)  '得到句柄

If adPos = 0 Then  '在搜索结果区的上面
    webB.Document.parentwindow.Scroll 0, adY - adH + 8  '修正下数据 正好对准
    x = 30 + Int((Rnd * adW) / 2)
    y = (Int((Rnd * adH) / 2) + 2) * &H10000
ElseIf adPos = 1 Then '在右侧的推广链接区
    webB.Document.parentwindow.Scroll adX, adY - 11 '修正下数据
    x = 150 + Int((Rnd * adW) / 2)
    y = (Int((Rnd * adH) / 2) + 2) * &H10000
ElseIf adPos = 2 Then '在搜索结果当中
    webB.Document.parentwindow.Scroll 0, adY - 11  '修正下数据
    x = 30 + Int((Rnd * adW) / 2)
    y = (Int((Rnd * adH) / 2) + 2) * &H10000
End If

'Debug.Print "Click:", x, y / &H10000
PostMessage wbHwnd, WM_LBUTTONDOWN, 1&, x + y
PostMessage wbHwnd, WM_LBUTTONUP, 1&, x + y

End Sub

有什么问题可以加我Q跟我讨论。

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