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[VBA]ウィンドウから HTMLDocument オブジェクトを取得する
Option Explicit
Private Declare PtrSafe Function CLSIDFromString Lib "ole32" (ByVal pString As LongPtr, ByRef pCLSID As Currency) As Long
Private Declare PtrSafe Function RegisterWindowMessageW Lib "user32" (ByVal lpString As LongPtr) As Long
Private Declare PtrSafe Function SendMessageTimeoutW Lib "user32" (ByVal hWnd As LongPtr, ByVal msg As Long, ByVal wParam As LongPtr, ByRef lParam As LongPtr, ByVal fuFlags As Long, ByVal uTimeout As Long, ByRef lpdwResult As Long) As LongPtr
Private Declare PtrSafe Function ObjectFromLresult Lib "oleacc" (ByVal lResult As Long, ByRef riid As Currency, ByVal wParam As LongPtr, ppvObject As Any) As Long
Private Enum SMTO
End Enum
' Internet Explorer_Server ウィンドウのハンドルから HTMLDocument オブジェクトを取得する
' 第 1 引数: InternetExplorer_Server のウィンドウハンドル
' 第 2 引数: 省略可能(タイムアウト時間)
' 第 3 引数: 省略可能(1:IHTMLDocument~8:IHTMLDocument8)
Public Function GetHtmlDocument(ByVal hWnd_InternetExplorer_Server As LongPtr, Optional ByVal uTimeout As Long = 1000, Optional ByVal documentVersion As Integer = 1) As Object ' As MSHTML.IHTMLDocument
Set GetHtmlDocument = Nothing
If documentVersion <= 0 Then
documentVersion = 1
ElseIf documentVersion >= 8 Then
documentVersion = 8
End If
Dim IID_IHTMLDocumentX As String
IID_IHTMLDocumentX = Split(",{626FC520-A41E-11cf-A731-00A0C9082637},{332c4425-26cb-11d0-b483-00c04fd90119},{3050f485-98b5-11cf-bb82-00aa00bdce0b},{3050f69a-98b5-11cf-bb82-00aa00bdce0b},{3050f80c-98b5-11cf-bb82-00aa00bdce0b},{30510417-98b5-11cf-bb82-00aa00bdce0b},{305104b8-98b5-11cf-bb82-00aa00bdce0b},{305107d0-98b5-11cf-bb82-00aa00bdce0b}", ",")(documentVersion - 1)
Dim InterfaceId(1) As Currency
Call CLSIDFromString(StrPtr(IID_IHTMLDocumentX), InterfaceId(0))
Dim lngMsg As Long
lngMsg = RegisterWindowMessageW(StrPtr("WM_HTML_GETOBJECT"))
If lngMsg <> 0 Then
Dim lpdwResult As Long
If SendMessageTimeoutW(hWnd_InternetExplorer_Server, lngMsg, 0, 0, SMTO.ABORTIFHUNG, uTimeout, lpdwResult) <> 0 Then
Dim hResult As Long
hResult = ObjectFromLresult(lpdwResult, InterfaceId(0), 0, GetHtmlDocument)
If hResult <> 0 Then
Err.Raise hResult
End If
End If
End If
End Function
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