Leaked source code of windows server 2003
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/////////////////////////////////////////////////////////////////////////////
// Copyright (C) 1993-1996 Microsoft Corporation. All Rights Reserved.
//
// MODULE: dataobj.h
//
// PURPOSE: Defines a simple IDataObject that can be used for basic drag
// and drop scenarios.
//
#ifndef __DATAOBJ__H
#define __DATAOBJ__H
// Class CDataObject
// -----------------
//
// Overview
// This data object provides a simple IDataObject implementation that
// can be used for basic drag and drop. When the caller allocates one
// of these objects, they are responsible for calling HrInitData() to
// tell the object what data it provides and in which formats. Once
// this is provided, the object can be passed to ::DoDragDrop() or put
// on the clipboard.
//
// Notes
// This object assumes that _ALL_ of the data it provides is given to
// it in a memory pointer. The object can however convert that memory
// pointer to either an HGLOBAL or IStream if the caller requests.
//
//
typedef HRESULT (CALLBACK *PFNFREEDATAOBJ)(PDATAOBJINFO pDataObjInfo, DWORD celt);
class CDataObject : public IDataObject
{
public:
// Constructors and Destructor
CDataObject();
~CDataObject();
// IUnknown Interface members
STDMETHODIMP QueryInterface(REFIID riid, LPVOID* ppv);
STDMETHODIMP_(ULONG) AddRef();
STDMETHODIMP_(ULONG) Release();
// IDataObject Interface members
STDMETHODIMP GetData(LPFORMATETC pFE, LPSTGMEDIUM pStgMedium);
STDMETHODIMP GetDataHere(LPFORMATETC pFE, LPSTGMEDIUM pStgMedium);
STDMETHODIMP QueryGetData(LPFORMATETC pFE);
STDMETHODIMP GetCanonicalFormatEtc(LPFORMATETC pFEIn, LPFORMATETC pFEOut);
STDMETHODIMP SetData(LPFORMATETC pFE, LPSTGMEDIUM pStgMedium,
BOOL fRelease);
STDMETHODIMP EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC** ppEnum);
STDMETHODIMP DAdvise(LPFORMATETC pFE, DWORD advf,
IAdviseSink* ppAdviseSink, LPDWORD pdwConnection);
STDMETHODIMP DUnadvise(DWORD dwConnection);
STDMETHODIMP EnumDAdvise(IEnumSTATDATA** ppEnumAdvise);
// Utility Routines
HRESULT Init(PDATAOBJINFO pDataObjInfo, DWORD celt, PFNFREEDATAOBJ pfnFree);
private:
ULONG m_cRef; // Object reference count
PDATAOBJINFO m_pInfo; // Information we provide
PFNFREEDATAOBJ m_pfnFree; // free funciton for the data object
DWORD m_celtInfo; // Number of elements in m_pInfo
};
OESTDAPI_(HRESULT) CreateDataObject(PDATAOBJINFO pDataObjInfo, DWORD celt, PFNFREEDATAOBJ pfnFree, IDataObject **ppDataObj);
#endif //__DATAOBJ__H