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通过HWND获取WebBrowser内容

2016-4-20 C++

参考资料：https://support.microsoft.com/en-us/kb/249232

已知一个窗口的HWND及窗口类为“Internet Explorer_Server"，获取显示的内容！

#include <mshtml.h>

#include <atlbase.h>

#include <oleacc.h>

BOOL CALLBACK EnumChildProc(HWND hwnd, LPARAM lParam)

{

    TCHAR buf[256] = { 0 };

    ::GetClassName(hwnd, buf, 256);

    if (_tcscmp(buf, _T("Internet Explorer_Server")) == 0)

    {

        *(HWND*)lParam = hwnd;

        return FALSE; //退出循环

    }

    return TRUE;

}

void GetDocInterface(HWND hWnd)

{

    CoInitialize(NULL);

    HINSTANCE hInst = ::LoadLibrary(_T("OLEACC.DLL");

    if (hInst != NULL && hWnd != NULL)

    {

        HWND hWndChild = NULL;

        ::EnumChildWindows(hWnd, EnumChildProc, (LPARAM)&hWndChild);

        if (hWndChild)

        {

            CComPtr<IHTMLDocument2> spDoc;

            LRESULT lRes;

            

            UINT nMsg = ::RegisterWindowMessage(_T("WM_HTML_GETOBJECT"));

            ::SendMessageTimeout(hWndChild, nMsg, 0L, 0L, SMTO_ABORTIFHUNG, 1000, (DWORD*)&lRes);

            LPFNOBJECTFROMLRESULT pfObjectFromLresult = (LPFNOBJECTFROMLRESULT)::GetProcAddress(hInst, _T("ObjectFromLresult"));

            if (pfObjectFromLresult != NULL)

            {

                HRESULT hr = (*pfObjectFromLresult )(lRes, IID_IHTMLDocument2, 0, (void**)&spDoc);

                if (SUCCEEDED(hr))

                {

                    IHTMLElement *p = NULL;

                    spDoc->get_body(&p); //接下去就跟操作IE一样

                }

            }

        }

        ::FreeLibrary(hInst);

    }

    ::CoUninitialize();

}

标签: HWND Internet Explorer_Server

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