利用IE浏览本地HTML,WORD, pdf格式文件

//利用IE控件，浏览WORD,pdf等文件。
void putLocalUrl(CComBSTR bstrCurPath, CComBSTR bstrFileName)
{
//获取IE控件指针
HWND hWnd = GetDlgItem(IDC_EXPLORER);
CComPtr<IUnknown> spUnk;
HRESULT hr = AtlAxGetControl(hWnd,&spUnk);
if (SUCCEEDED(hr))
{
hr = spUnk ->QueryInterface(IID_IWebBrowser2, (void **)&m_spWebBrowser2 );
//GetDlgControl(IDC_EXPLORER,IID_IWebBrowser2,(void **)&m_spWebBrowser2);
if (SUCCEEDED(hr))
{
CComBSTR bstrURL(bstrCurPath);
bstrURL += bstrFileName;
PTCHAR lpPath = _com_util::ConvertBSTRToString(bstrURL);
if (_taccess(lpPath,0) == 0)
{
hr = m_spWebBrowser2->put_Visible(TRUE);
VARIANT vInfo;
vInfo.vt=VT_EMPTY;
hr = m_spWebBrowser2 ->Navigate( bstrURL, &vInfo, &vInfo, &vInfo, &vInfo );
}
else
{
MessageBox("无法加载!找不到路径!","IEContainer",MB_OK);
}
}
}
}