DLL中调用IHTMLDocument2Ptr pDoc的Write出错的原因？先解决着，立即给分！谢谢！

[taianmonkey]

MSHTML::IHTMLDocument2Ptr pDoc;
MSHTML::IHTMLDocument3Ptr pDoc3;
MSHTML::IHTMLElementCollectionPtr pCollection;
MSHTML::IHTMLElementPtr pElement;

HRESULT hr = CoCreateInstance(CLSID_HTMLDocument, NULL, CLSCTX_INPROC_SERVER, IID_IHTMLDocument2, (void**)&pDoc);

//put the code into SAFEARRAY and write it into document
SAFEARRAY* psa = SafeArrayCreateVector(VT_VARIANT, 0, 1);
VARIANT *param;
bstr_t bsData = lpFormComment;
hr = SafeArrayAccessData(psa, (LPVOID*)¶m);
param->vt = VT_BSTR;
param->bstrVal = (BSTR)bsData;

hr = m_pDoc->write(psa);
hr = m_pDoc->close();

SafeArrayDestroy(psa);

[xiang_yun]

建议楼主查看hr = m_pDoc->write(psa);
返回的hr值，可以通过返回值判断出错的信息
另外前面对参数的操作是否成功，都加个判断，就知道出错在那里了

[taianmonkey]

就在m_pDoc->write(psa); 上崩溃了，根本不知道为什么？看样子是内存溢出了！

[taianmonkey]

MSHTML::IHTMLDocument2Ptr pDoc;
MSHTML::IHTMLDocument3Ptr pDoc3;
MSHTML::IHTMLElementCollectionPtr pCollection;
MSHTML::IHTMLElementPtr pElement;

//HRESULT hr = CoCreateInstance(CLSID_HTMLDocument, NULL, CLSCTX_INPROC_SERVER, IID_IHTMLDocument2, (void**)&pDoc);

//put the code into SAFEARRAY and write it into document
SAFEARRAY* psa = SafeArrayCreateVector(VT_VARIANT, 0, 1);
VARIANT *param;
bstr_t bsData = lpFormComment;
hr = SafeArrayAccessData(psa, (LPVOID*)¶m);
param->vt = VT_BSTR;
param->bstrVal = (BSTR)bsData;

hr = m_pDoc->write(psa);
hr = m_pDoc->close();

SafeArrayDestroy(psa);

[shinbo]

CoCreateInstance 有没有调用成功
在此之前先调用一下 CoInitialize( NULL );

[filec75]

mark

[ahhshan]

mark

[ToperRay]

try

catch

看不出来错误信息吗？

[muxiaozhou]

[Quote=引用 6 楼 shinbo 的回复:]
CoCreateInstance 有没有调用成功
在此之前先调用一下 CoInitialize( NULL );
[/Quote]
我也遇到这个问题了，试了这个方法可以了，加在MSHTML::IHTMLDocument2Ptr pDoc; 这个前面

[e7844]

webbrowser2还没初始化就写，就会崩溃

在写之前先m_ie.Navigate("about:blank",NULL,NULL,NULL,NULL);

然后约600多毫秒之后再写