在IE web对话框窗口中自动处理HTML文档

Question

发布这个问题，我可以为像我这样需要解决这个问题的人提供一个完整的例子吗。。。

有时，当自动执行IE时，您可能会面临一个弹出对话框，需要与之交互：我在这里特别谈论的是特定于IE的模式对话框，它使用showModalDialog打开

https://msdn.microsoft.com/en-us/library/ms536759(v=vs.85).aspx

这些对话框不同于典型的"弹出式"对话框或基于window.open()的对话框——尽管它们包含HTML，但要获得对话框中包含的文档的引用并不容易。例如，在windows外壳下的窗口中迭代不会找到这种类型的对话框。

我认为必须有一些方法来解决这个问题，使用Windows API，我通过谷歌找到了一系列相关的文章，但没有完整和独立的例子。

看看我的答案，我是如何解决我的特定用例的——如果你需要类似的东西，应该很容易重复使用。

Answer 1

这是我最终得到的(很抱歉没有包括我找到关键部分的各种链接-如果我能重新找到它们，稍后会添加)

编辑：https://social.msdn.microsoft.com/Forums/en-US/baf3cb64-8858-4d2d-9d7b-eaee76919256/modify-the-code-obtained-from-the-internet-explorerserver-hwnd-handle?forum=vbgeneral

声明(如果您安装了64位Office，则需要进行一些调整)

Option Explicit
' Requires: VBA project reference to "Microsoft HTML Object Library"
Private Const SMTO_ABORTIFHUNG = &H2
Private Const GW_CHILD = 5
Private Const GW_HWNDNEXT = 2
Private Type UUID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(0 To 7) As Byte
End Type
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" _
(ByVal hWnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Private Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" _
(ByVal hWnd As Long) As Long
Private Declare Function GetWindow Lib "user32" _
(ByVal hWnd As Long, ByVal wCmd As Long) As Long
Private Declare Function IsWindowVisible Lib "user32" _
(ByVal hWnd As Long) As Boolean
Private Declare Function GetClassName Lib "user32" Alias "GetClassNameA" _
(ByVal hWnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Private Declare Function RegisterWindowMessage Lib "user32" _
Alias "RegisterWindowMessageA" (ByVal lpString As String) As Long
Private Declare Function SendMessageTimeout Lib "user32" _
Alias "SendMessageTimeoutA" ( _
ByVal hWnd As Long, _
ByVal msg As Long, _
ByVal wParam As Long, _
lParam As Any, _
ByVal fuFlags As Long, _
ByVal uTimeout As Long, _
lpdwResult As Long) As Long
Private Declare Function ObjectFromLresult Lib "oleacc" ( _
ByVal lResult As Long, _
riid As UUID, _
ByVal wParam As Long, _
ppvObject As Any) As Long

示例用法：

'An example of how to use this approach - other subs below should not need adjusting
Sub DialogDemo()
Const DLG_TITLE = "User Info -- Webpage Dialog" '<< the dialog title
Dim doc As IHTMLDocument
Set doc = GetIEDialogDocument(DLG_TITLE)
If Not doc Is Nothing Then
'Debug.Print doc.body.innerHTML
doc.getElementById("password_id").Value = "password"
doc.getElementById("Notes_id").Value = "notes go here"
doc.getElementById("b_Ok_id").Click '<< click OK
Else
MsgBox "Dialog Window '" & DLG_TITLE & "' was not found!", vbOKOnly + vbExclamation
End If
End Sub
'Given an IE dialog window title, find the window and return a reference
'   to the embedded HTML document object
Function GetIEDialogDocument(dialogTitle As String) As IHTMLDocument
Dim lhWndP As Long, lhWndC As Long, doc As IHTMLDocument
'find the IE dialog window given its title
If GetHandleFromPartialCaption(lhWndP, dialogTitle) Then
Debug.Print "Found dialog window - " & dialogTitle & "(" & TheClassName(lhWndP) & ")"
lhWndC = GetWindow(lhWndP, GW_CHILD)  'Find Child
If lhWndC > 0 Then
If TheClassName(lhWndC) = "Internet Explorer_Server" Then
Debug.Print , "getting the document..."
Set doc = IEDOMFromhWnd(lhWndC)
End If
End If
Else
Debug.Print "Window '" & dialogTitle & "' not found!"
End If
Set GetIEDialogDocument = doc
End Function
' IEDOMFromhWnd
' Returns the IHTMLDocument interface from a WebBrowser window
' hWnd - Window handle of the control
Function IEDOMFromhWnd(ByVal hWnd As Long) As IHTMLDocument
Dim IID_IHTMLDocument As UUID
Dim hWndChild As Long
Dim lRes As Long
Dim lMsg As Long
Dim hr As Long
If hWnd <> 0 Then
lMsg = RegisterWindowMessage("WM_HTML_GETOBJECT") ' Register the message
SendMessageTimeout hWnd, lMsg, 0, 0, SMTO_ABORTIFHUNG, 1000, lRes ' Get the object pointer
If lRes Then
With IID_IHTMLDocument ' Initialize the interface ID
.Data1 = &H626FC520
.Data2 = &HA41E
.Data3 = &H11CF
.Data4(0) = &HA7
.Data4(1) = &H31
.Data4(2) = &H0
.Data4(3) = &HA0
.Data4(4) = &HC9
.Data4(5) = &H8
.Data4(6) = &H26
.Data4(7) = &H37
End With
' Get the object from lRes (note - returns the object via the last parameter)
hr = ObjectFromLresult(lRes, IID_IHTMLDocument, 0, IEDOMFromhWnd)
End If
End If 'hWnd<>0
End Function
'utilty function for getting the classname given a window handle
Function TheClassName(lhWnd As Long)
Dim strText As String, lngRet As Long
strText = String$(100, Chr$(0))
lngRet = GetClassName(lhWnd, strText, 100)
TheClassName = Left$(strText, lngRet)
End Function
Private Function GetHandleFromPartialCaption(ByRef lWnd As Long, _
ByVal sCaption As String) As Boolean
Dim lhWndP As Long, sStr As String
GetHandleFromPartialCaption = False
lhWndP = FindWindow(vbNullString, vbNullString) 'PARENT WINDOW
Do While lhWndP <> 0
sStr = String(GetWindowTextLength(lhWndP) + 1, Chr$(0))
GetWindowText lhWndP, sStr, Len(sStr)
sStr = Left$(sStr, Len(sStr) - 1)
If Len(sStr) > 2 Then
If UCase(sStr) Like "*ARG*" Then Debug.Print sStr
End If
If InStr(1, sStr, sCaption) > 0 Then
GetHandleFromPartialCaption = True
lWnd = lhWndP
Exit Do
End If
lhWndP = GetWindow(lhWndP, GW_HWNDNEXT)
Loop
End Function