本文整理汇总了C++中IPersistStream::QueryInterface方法的典型用法代码示例。如果您正苦于以下问题：C++ IPersistStream::QueryInterface方法的具体用法？C++ IPersistStream::QueryInterface怎么用？C++ IPersistStream::QueryInterface使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类IPersistStream的用法示例。
在下文中一共展示了IPersistStream::QueryInterface方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: LoadPropertyStoreFromStream
HRESULT LoadPropertyStoreFromStream(IStream *pstm, REFIID riid, void **ppv)
{
*ppv = NULL;
STATSTG stat;
HRESULT hr = pstm->Stat(&stat, STATFLAG_NONAME);
if (SUCCEEDED(hr))
{
IPersistStream *pps;
hr = PSCreateMemoryPropertyStore(IID_PPV_ARGS(&pps));
if (SUCCEEDED(hr))
{
if (stat.cbSize.QuadPart == 0)
{
hr = S_OK; // empty stream => empty property store
}
else if (stat.cbSize.QuadPart > (128 * 1024))
{
hr = STG_E_MEDIUMFULL; // can't be that large
}
else
{
hr = pps->Load(pstm);
}
if (SUCCEEDED(hr))
{
hr = pps->QueryInterface(riid, ppv);
}
pps->Release();
}
}
return hr;
}示例2: HError
HRESULT CPkcs7::SaveIntoJavaClassFile(FILEHANDLE hFile,LPCOLESTR wszFileName,BOOL fClearDirty)
// Save this signed data (presumably already signed) into the right place in the class file
{
HRESULT hr = S_OK;
CFileStream stm;
if (stm.OpenFileForWriting(hFile, wszFileName, FALSE))
{
IPersistStream* pPerStream;
hr = CJavaClassFile::CreateInstance(NULL, IID_IPersistStream, (LPVOID*)&pPerStream);
if (hr == S_OK)
{
hr = pPerStream->Load(&stm); // load the class file
if (hr == S_OK)
{
BLOB b;
hr = CPersistMemoryHelper2::Save(&b, FALSE); // get our bits
if (hr == S_OK)
{
IInsertSig* pSig;
hr = pPerStream->QueryInterface(IID_IInsertSig, (LPVOID*)&pSig);
if (hr == S_OK)
{
hr = pSig->SaveSig(&b); // stuff our bits in
pSig->Release();
}
FreeTaskMem(b);
}
if (hr == S_OK)
{
stm.Reset();
stm.Truncate();
hr = pPerStream->Save(&stm, FALSE); // save the class file
}
}
pPerStream->Release();
}
}
else
hr = HError();
if (hr == S_OK && fClearDirty)
m_isDirty = FALSE;
return hr;
}