BOOL AFXAPI _AfxLoadObjectFromStreamedPropset(LPUNKNOWN lpUnknown, LPSTREAM lpStream)
{
ASSERT_POINTER(lpUnknown, IUnknown);
ASSERT_POINTER(lpStream, IStream);
BOOL bSuccess = FALSE;
LPDATAOBJECT pDataObj = NULL;
if (SUCCEEDED(lpUnknown->QueryInterface(IID_IDataObject,
(LPVOID*)&pDataObj)))
{
ASSERT_POINTER(pDataObj, IDataObject);
// Set the persistent propset format on the object.
FORMATETC formatEtc;
STGMEDIUM stgMedium;
formatEtc.cfFormat = _AfxGetClipboardFormatPersistPropset();
formatEtc.ptd = NULL;
formatEtc.dwAspect = DVASPECT_CONTENT;
formatEtc.lindex = -1;
formatEtc.tymed = TYMED_ISTREAM;
stgMedium.tymed = TYMED_ISTREAM;
stgMedium.pstm = lpStream;
stgMedium.pUnkForRelease = NULL;
bSuccess = SUCCEEDED(pDataObj->SetData(&formatEtc, &stgMedium, FALSE));
pDataObj->Release();
}
return bSuccess;
}
BOOL AFXAPI _AfxOleMatchPropsetClipFormat(CLIPFORMAT cfFormat, LPCLSID lpFmtID)
{
if (cfFormat == _AfxGetClipboardFormatPersistPropset())
{
*lpFmtID = CLSID_PersistPropset;
return TRUE;
}
if (cfFormat == _AfxGetClipboardFormatConvertVBX())
{
*lpFmtID = CLSID_ConvertVBX;
return TRUE;
}
return FALSE;
}
BOOL AFXAPI _AfxSaveObjectInPropset(LPUNKNOWN pUnk, CPropertySection& psec,
DWORD dwPropID)
{
if (pUnk == NULL)
return FALSE;
ASSERT_POINTER(pUnk, IUnknown);
BOOL bSuccess = FALSE;
LPDATAOBJECT pDataObj;
if (SUCCEEDED(pUnk->QueryInterface(IID_IDataObject,
(LPVOID*)&pDataObj)))
{
// Get the persistent propset format from object.
FORMATETC formatEtc;
STGMEDIUM stgMedium;
formatEtc.cfFormat = _AfxGetClipboardFormatPersistPropset();
formatEtc.ptd = NULL;
formatEtc.dwAspect = DVASPECT_CONTENT;
formatEtc.lindex = -1;
formatEtc.tymed = TYMED_ISTREAM;
stgMedium.tymed = TYMED_NULL;
stgMedium.pUnkForRelease = NULL;
if (SUCCEEDED(pDataObj->GetData(&formatEtc, &stgMedium)))
{
if (stgMedium.tymed == TYMED_ISTREAM)
{
LPSTREAM pstm = stgMedium.pstm;
// Seek to start of stream.
if (SUCCEEDED(pstm->Seek(_afxLargeZero, STREAM_SEEK_SET, NULL)))
{
// Create a "blobbed" propset from the stream
bSuccess = _AfxSaveStreamDataAsBlobProp(stgMedium.pstm,
psec, dwPropID, VT_BLOB_PROPSET);
}
}
// Cleanup
ReleaseStgMedium(&stgMedium);
}
pDataObj->Release();
}
LPPERSISTSTREAM pPersStm = NULL;
if ((!bSuccess) &&
SUCCEEDED(pUnk->QueryInterface(IID_IPersistStream,
(LPVOID*)&pPersStm)))
{
// Get the object to save itself into a stream, then store that
// streamed data as a blob.
ASSERT_POINTER(pPersStm, IPersistStream);
LPSTREAM pstm = _AfxCreateMemoryStream();
if (pstm != NULL)
{
if (SUCCEEDED(::OleSaveToStream(pPersStm, pstm)) &&
SUCCEEDED(pstm->Seek(_afxLargeZero, STREAM_SEEK_SET, NULL)))
{
bSuccess = _AfxSaveStreamDataAsBlobProp(pstm, psec,
dwPropID, VT_BLOB);
}
pstm->Release();
}
pPersStm->Release();
}
return bSuccess;
}