CComBSTR::ReadFromStream
Sets the m_str member to the BSTR contained in the specified stream.
HRESULT ReadFromStream(
IStream* pStream
) throw( );
Parameters
- pStream
[in] A pointer to the IStream interface on the stream containing the data.
Return Value
A standard HRESULT value.
Remarks
ReadToStream requires the contents of the stream at the current position to be compatible with the data format written out by a call to WriteToStream.
Example
IDataObject* pDataObj;
// Fill in the FORMATETC struct to retrieve desired format
// from clipboard
FORMATETC formatetcIn = {CF_TEXT, NULL, DVASPECT_CONTENT, -1, TYMED_ISTREAM};
STGMEDIUM medium;
ZeroMemory(&medium, sizeof(STGMEDIUM));
// Get IDataObject from clipboard
HRESULT hr = ::OleGetClipboard(&pDataObj);
// Retrieve data from clipboard
hr = pDataObj->GetData(&formatetcIn, &medium);
if (SUCCEEDED(hr) && medium.tymed == TYMED_ISTREAM)
{
CComBSTR bstrStr;
// Get BSTR out of the stream
hr = bstrStr.ReadFromStream(medium.pstm);
//release the stream
::ReleaseStgMedium(&medium);
}
Requirements
Header: atlbase.h