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refeactor all IUnknown implementations using IComSrvBase

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svn path=/trunk/; revision=18063
This commit is contained in:
Martin Fuchs 2005-09-25 17:59:20 +00:00
parent 029ccdccaa
commit 8b950fec34
4 changed files with 121 additions and 216 deletions
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3
reactos/subsys/system/explorer/shell/shellbrowser.h
View file

@ -58,8 +58,7 @@ struct BrowserCallback
/// Implementation of IShellBrowserImpl interface in explorer child windows /// Implementation of IShellBrowserImpl interface in explorer child windows
struct ShellBrowser : public IShellBrowserImpl struct ShellBrowser : public IShellBrowserImpl
#ifndef __MINGW32__ // IShellFolderViewCB missing in MinGW (as of 25.09.2005) #ifndef __MINGW32__ // IShellFolderViewCB missing in MinGW (as of 25.09.2005)
, public IComSrvBase<IShellFolderViewCB, ShellBrowser>, , public IComSrvBase<IShellFolderViewCB, ShellBrowser>, public SimpleComObject
public SimpleComObject
#endif #endif
{ {
ShellBrowser(HWND hwnd, HWND left_hwnd, WindowHandle& right_hwnd, ShellPathInfo& create_info, ShellBrowser(HWND hwnd, HWND left_hwnd, WindowHandle& right_hwnd, ShellPathInfo& create_info,

6
reactos/subsys/system/explorer/shell/webchild.h
View file

@ -530,9 +530,9 @@ interface FixedDWebBrowserEvents2 : public IDispatch
#endif #endif
}; };
struct ANSUNC DWebBrowserEvents2Impl : public SimpleComObject, struct ANSUNC DWebBrowserEvents2Impl
public IComSrvBase<FixedDWebBrowserEvents2, DWebBrowserEvents2Impl>, : public IComSrvBase<FixedDWebBrowserEvents2, DWebBrowserEvents2Impl>, public SimpleComObject,
public DWebBrowserEvents2IF public DWebBrowserEvents2IF
{ {
typedef IComSrvBase<FixedDWebBrowserEvents2, DWebBrowserEvents2Impl> super; typedef IComSrvBase<FixedDWebBrowserEvents2, DWebBrowserEvents2Impl> super;

105
reactos/subsys/system/explorer/utility/dragdropimpl.cpp
View file

@ -22,7 +22,8 @@
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
IDataObjectImpl::IDataObjectImpl(IDropSourceImpl* pDropSource) IDataObjectImpl::IDataObjectImpl(IDropSourceImpl* pDropSource)
: m_pDropSource(pDropSource), : super(IID_IDataObject),
m_pDropSource(pDropSource),
m_cRefCount(0) m_cRefCount(0)
{ {
} }
@ -33,37 +34,6 @@ IDataObjectImpl::~IDataObjectImpl()
ReleaseStgMedium(it->_medium); ReleaseStgMedium(it->_medium);
} }
STDMETHODIMP IDataObjectImpl::QueryInterface(/* [in] */ REFIID riid,
/* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject)
{
*ppvObject = NULL;
if (IID_IUnknown==riid || IID_IDataObject==riid)
*ppvObject=this;
/*if (riid == IID_IAsyncOperation)
*ppvObject=(IAsyncOperation*)this;*/
if (NULL!=*ppvObject)
{
((LPUNKNOWN)*ppvObject)->AddRef();
return S_OK;
}
return E_NOINTERFACE;
}
STDMETHODIMP_(ULONG) IDataObjectImpl::AddRef()
{
return ++m_cRefCount;
}
STDMETHODIMP_(ULONG) IDataObjectImpl::Release()
{
long nTemp = --m_cRefCount;
if (nTemp == 0)
delete this;
return nTemp;
}
STDMETHODIMP IDataObjectImpl::GetData( STDMETHODIMP IDataObjectImpl::GetData(
/* [unique][in] */ FORMATETC __RPC_FAR *pformatetcIn, /* [unique][in] */ FORMATETC __RPC_FAR *pformatetcIn,
/* [out] */ STGMEDIUM __RPC_FAR *pmedium) /* [out] */ STGMEDIUM __RPC_FAR *pmedium)
@ -255,38 +225,6 @@ HRESULT STDMETHODCALLTYPE IDataObjectImpl::EnumDAdvise(
// IDropSourceImpl Class // IDropSourceImpl Class
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
STDMETHODIMP IDropSourceImpl::QueryInterface(/* [in] */ REFIID riid,
/* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject)
{
*ppvObject = NULL;
if (IID_IUnknown==riid || IID_IDropSource==riid)
*ppvObject=this;
if (*ppvObject != NULL)
{
((LPUNKNOWN)*ppvObject)->AddRef();
return S_OK;
}
return E_NOINTERFACE;
}
STDMETHODIMP_(ULONG) IDropSourceImpl::AddRef()
{
return ++m_cRefCount;
}
STDMETHODIMP_(ULONG) IDropSourceImpl::Release()
{
long nTemp = --m_cRefCount;
assert(nTemp >= 0);
if (nTemp == 0)
delete this;
return nTemp;
}
STDMETHODIMP IDropSourceImpl::QueryContinueDrag( STDMETHODIMP IDropSourceImpl::QueryContinueDrag(
/* [in] */ BOOL fEscapePressed, /* [in] */ BOOL fEscapePressed,
/* [in] */ DWORD grfKeyState) /* [in] */ DWORD grfKeyState)
@ -314,7 +252,8 @@ STDMETHODIMP IDropSourceImpl::GiveFeedback(
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
EnumFormatEtcImpl::EnumFormatEtcImpl(const FormatArray& ArrFE) EnumFormatEtcImpl::EnumFormatEtcImpl(const FormatArray& ArrFE)
: m_cRefCount(0), : super(IID_IEnumFORMATETC),
m_cRefCount(0),
m_iCur(0) m_iCur(0)
{ {
for(FormatArray::const_iterator it=ArrFE.begin(); it!=ArrFE.end(); ++it) for(FormatArray::const_iterator it=ArrFE.begin(); it!=ArrFE.end(); ++it)
@ -322,45 +261,15 @@ EnumFormatEtcImpl::EnumFormatEtcImpl(const FormatArray& ArrFE)
} }
EnumFormatEtcImpl::EnumFormatEtcImpl(const StorageArray& ArrFE) EnumFormatEtcImpl::EnumFormatEtcImpl(const StorageArray& ArrFE)
: m_cRefCount(0), : super(IID_IEnumFORMATETC),
m_cRefCount(0),
m_iCur(0) m_iCur(0)
{ {
for(StorageArray::const_iterator it=ArrFE.begin(); it!=ArrFE.end(); ++it) for(StorageArray::const_iterator it=ArrFE.begin(); it!=ArrFE.end(); ++it)
m_pFmtEtc.push_back(*it->_format); m_pFmtEtc.push_back(*it->_format);
} }
STDMETHODIMP EnumFormatEtcImpl::QueryInterface(REFIID refiid, void** ppv) STDMETHODIMP EnumFormatEtcImpl::Next(ULONG celt,LPFORMATETC lpFormatEtc, ULONG* pceltFetched)
{
*ppv = NULL;
if (IID_IUnknown==refiid || IID_IEnumFORMATETC==refiid)
*ppv=this;
if (*ppv != NULL)
{
((LPUNKNOWN)*ppv)->AddRef();
return S_OK;
}
return E_NOINTERFACE;
}
STDMETHODIMP_(ULONG) EnumFormatEtcImpl::AddRef(void)
{
return ++m_cRefCount;
}
STDMETHODIMP_(ULONG) EnumFormatEtcImpl::Release(void)
{
long nTemp = --m_cRefCount;
assert(nTemp >= 0);
if (nTemp == 0)
delete this;
return nTemp;
}
STDMETHODIMP EnumFormatEtcImpl::Next( ULONG celt,LPFORMATETC lpFormatEtc, ULONG* pceltFetched)
{ {
if (pceltFetched != NULL) if (pceltFetched != NULL)
*pceltFetched=0; *pceltFetched=0;

223
reactos/subsys/system/explorer/utility/dragdropimpl.h
View file

@ -4,7 +4,7 @@
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE. PARTICULAR PURPOSE.
Author: Leon Finker 11/2000 Author: Leon Finker 11/2000
Modifications: replaced ATL by STL, Martin Fuchs 7/2003 Modifications: replaced ATL by STL, Martin Fuchs 7/2003
**************************************************************************/ **************************************************************************/
@ -24,60 +24,64 @@ typedef vector<DataStorage> StorageArray;
/// implementation of IEnumFORMATETC interface /// implementation of IEnumFORMATETC interface
class EnumFormatEtcImpl : public IEnumFORMATETC class EnumFormatEtcImpl
: public IComSrvBase<IEnumFORMATETC, EnumFormatEtcImpl>, public SimpleComObject
{ {
private: typedef IComSrvBase<IEnumFORMATETC, EnumFormatEtcImpl> super;
ULONG m_cRefCount;
FormatArray m_pFmtEtc;
size_t m_iCur;
public: private:
EnumFormatEtcImpl(const FormatArray& ArrFE); ULONG m_cRefCount;
FormatArray m_pFmtEtc;
size_t m_iCur;
public:
EnumFormatEtcImpl(const FormatArray& ArrFE);
EnumFormatEtcImpl(const StorageArray& ArrFE); EnumFormatEtcImpl(const StorageArray& ArrFE);
virtual ~EnumFormatEtcImpl() {} virtual ~EnumFormatEtcImpl() {}
//IUnknown members //IEnumFORMATETC members
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, void**); virtual HRESULT STDMETHODCALLTYPE Next(ULONG, LPFORMATETC, ULONG*);
virtual ULONG STDMETHODCALLTYPE AddRef(void); virtual HRESULT STDMETHODCALLTYPE Skip(ULONG);
virtual ULONG STDMETHODCALLTYPE Release(void); virtual HRESULT STDMETHODCALLTYPE Reset(void);
virtual HRESULT STDMETHODCALLTYPE Clone(IEnumFORMATETC**);
//IEnumFORMATETC members
virtual HRESULT STDMETHODCALLTYPE Next(ULONG, LPFORMATETC, ULONG*);
virtual HRESULT STDMETHODCALLTYPE Skip(ULONG);
virtual HRESULT STDMETHODCALLTYPE Reset(void);
virtual HRESULT STDMETHODCALLTYPE Clone(IEnumFORMATETC**);
}; };
/// implementation of IDropSource interface /// implementation of IDropSource interface
class IDropSourceImpl : public IDropSource class IDropSourceImpl
: public IComSrvBase<IDropSource, IDropSourceImpl>, public SimpleComObject
{ {
typedef IComSrvBase<IDropSource, IDropSourceImpl> super;
long m_cRefCount; long m_cRefCount;
public: public:
bool m_bDropped; bool m_bDropped;
IDropSourceImpl::IDropSourceImpl() : m_cRefCount(0), m_bDropped(false) {} IDropSourceImpl()
: super(IID_IDropSource),
m_cRefCount(0),
m_bDropped(false)
{
}
virtual ~IDropSourceImpl() {} virtual ~IDropSourceImpl() {}
//IUnknown
virtual HRESULT STDMETHODCALLTYPE QueryInterface(
/* [in] */ REFIID riid,
/* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject);
virtual ULONG STDMETHODCALLTYPE AddRef();
virtual ULONG STDMETHODCALLTYPE Release();
//IDropSource //IDropSource
virtual HRESULT STDMETHODCALLTYPE QueryContinueDrag( virtual HRESULT STDMETHODCALLTYPE QueryContinueDrag(
/* [in] */ BOOL fEscapePressed, /* [in] */ BOOL fEscapePressed,
/* [in] */ DWORD grfKeyState); /* [in] */ DWORD grfKeyState);
virtual HRESULT STDMETHODCALLTYPE GiveFeedback( virtual HRESULT STDMETHODCALLTYPE GiveFeedback(
/* [in] */ DWORD dwEffect); /* [in] */ DWORD dwEffect);
}; };
/// implementation of IDataObject interface /// implementation of IDataObject interface
class IDataObjectImpl : public IDataObject//,public IAsyncOperation class IDataObjectImpl
: public IComSrvBase<IDataObject, IDataObjectImpl>, public SimpleComObject
//public IAsyncOperation
{ {
typedef IComSrvBase<IDataObject, IDataObjectImpl> super;
IDropSourceImpl* m_pDropSource; IDropSourceImpl* m_pDropSource;
long m_cRefCount; long m_cRefCount;
@ -89,79 +93,72 @@ public:
void CopyMedium(STGMEDIUM* pMedDest, STGMEDIUM* pMedSrc, FORMATETC* pFmtSrc); void CopyMedium(STGMEDIUM* pMedDest, STGMEDIUM* pMedSrc, FORMATETC* pFmtSrc);
//IUnknown
virtual HRESULT STDMETHODCALLTYPE QueryInterface(
/* [in] */ REFIID riid,
/* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject);
virtual ULONG STDMETHODCALLTYPE AddRef();
virtual ULONG STDMETHODCALLTYPE Release();
//IDataObject //IDataObject
virtual /* [local] */ HRESULT STDMETHODCALLTYPE GetData( virtual /* [local] */ HRESULT STDMETHODCALLTYPE GetData(
/* [unique][in] */ FORMATETC __RPC_FAR *pformatetcIn, /* [unique][in] */ FORMATETC __RPC_FAR *pformatetcIn,
/* [out] */ STGMEDIUM __RPC_FAR *pmedium); /* [out] */ STGMEDIUM __RPC_FAR *pmedium);
virtual /* [local] */ HRESULT STDMETHODCALLTYPE GetDataHere( virtual /* [local] */ HRESULT STDMETHODCALLTYPE GetDataHere(
/* [unique][in] */ FORMATETC __RPC_FAR *pformatetc, /* [unique][in] */ FORMATETC __RPC_FAR *pformatetc,
/* [out][in] */ STGMEDIUM __RPC_FAR *pmedium); /* [out][in] */ STGMEDIUM __RPC_FAR *pmedium);
virtual HRESULT STDMETHODCALLTYPE QueryGetData( virtual HRESULT STDMETHODCALLTYPE QueryGetData(
/* [unique][in] */ FORMATETC __RPC_FAR *pformatetc); /* [unique][in] */ FORMATETC __RPC_FAR *pformatetc);
virtual HRESULT STDMETHODCALLTYPE GetCanonicalFormatEtc( virtual HRESULT STDMETHODCALLTYPE GetCanonicalFormatEtc(
/* [unique][in] */ FORMATETC __RPC_FAR *pformatectIn, /* [unique][in] */ FORMATETC __RPC_FAR *pformatectIn,
/* [out] */ FORMATETC __RPC_FAR *pformatetcOut); /* [out] */ FORMATETC __RPC_FAR *pformatetcOut);
virtual /* [local] */ HRESULT STDMETHODCALLTYPE SetData( virtual /* [local] */ HRESULT STDMETHODCALLTYPE SetData(
/* [unique][in] */ FORMATETC __RPC_FAR *pformatetc, /* [unique][in] */ FORMATETC __RPC_FAR *pformatetc,
/* [unique][in] */ STGMEDIUM __RPC_FAR *pmedium, /* [unique][in] */ STGMEDIUM __RPC_FAR *pmedium,
/* [in] */ BOOL fRelease); /* [in] */ BOOL fRelease);
virtual HRESULT STDMETHODCALLTYPE EnumFormatEtc( virtual HRESULT STDMETHODCALLTYPE EnumFormatEtc(
/* [in] */ DWORD dwDirection, /* [in] */ DWORD dwDirection,
/* [out] */ IEnumFORMATETC __RPC_FAR *__RPC_FAR *ppenumFormatEtc); /* [out] */ IEnumFORMATETC __RPC_FAR *__RPC_FAR *ppenumFormatEtc);
virtual HRESULT STDMETHODCALLTYPE DAdvise( virtual HRESULT STDMETHODCALLTYPE DAdvise(
/* [in] */ FORMATETC __RPC_FAR *pformatetc, /* [in] */ FORMATETC __RPC_FAR *pformatetc,
/* [in] */ DWORD advf, /* [in] */ DWORD advf,
/* [unique][in] */ IAdviseSink __RPC_FAR *pAdvSink, /* [unique][in] */ IAdviseSink __RPC_FAR *pAdvSink,
/* [out] */ DWORD __RPC_FAR *pdwConnection); /* [out] */ DWORD __RPC_FAR *pdwConnection);
virtual HRESULT STDMETHODCALLTYPE DUnadvise( virtual HRESULT STDMETHODCALLTYPE DUnadvise(
/* [in] */ DWORD dwConnection); /* [in] */ DWORD dwConnection);
virtual HRESULT STDMETHODCALLTYPE EnumDAdvise( virtual HRESULT STDMETHODCALLTYPE EnumDAdvise(
/* [out] */ IEnumSTATDATA __RPC_FAR *__RPC_FAR *ppenumAdvise); /* [out] */ IEnumSTATDATA __RPC_FAR *__RPC_FAR *ppenumAdvise);
//IAsyncOperation //IAsyncOperation
//virtual HRESULT STDMETHODCALLTYPE SetAsyncMode( //virtual HRESULT STDMETHODCALLTYPE SetAsyncMode(
// /* [in] */ BOOL fDoOpAsync) // /* [in] */ BOOL fDoOpAsync)
//{ //{
// return E_NOTIMPL; // return E_NOTIMPL;
//} //}
// //
//virtual HRESULT STDMETHODCALLTYPE GetAsyncMode( //virtual HRESULT STDMETHODCALLTYPE GetAsyncMode(
// /* [out] */ BOOL __RPC_FAR *pfIsOpAsync) // /* [out] */ BOOL __RPC_FAR *pfIsOpAsync)
//{ //{
// return E_NOTIMPL; // return E_NOTIMPL;
//} //}
// //
//virtual HRESULT STDMETHODCALLTYPE StartOperation( //virtual HRESULT STDMETHODCALLTYPE StartOperation(
// /* [optional][unique][in] */ IBindCtx __RPC_FAR *pbcReserved) // /* [optional][unique][in] */ IBindCtx __RPC_FAR *pbcReserved)
//{ //{
// return E_NOTIMPL; // return E_NOTIMPL;
//} //}
// //
//virtual HRESULT STDMETHODCALLTYPE InOperation( //virtual HRESULT STDMETHODCALLTYPE InOperation(
// /* [out] */ BOOL __RPC_FAR *pfInAsyncOp) // /* [out] */ BOOL __RPC_FAR *pfInAsyncOp)
//{ //{
// return E_NOTIMPL; // return E_NOTIMPL;
//} //}
// //
//virtual HRESULT STDMETHODCALLTYPE EndOperation( //virtual HRESULT STDMETHODCALLTYPE EndOperation(
// /* [in] */ HRESULT hResult, // /* [in] */ HRESULT hResult,
// /* [unique][in] */ IBindCtx __RPC_FAR *pbcReserved, // /* [unique][in] */ IBindCtx __RPC_FAR *pbcReserved,
// /* [in] */ DWORD dwEffects) // /* [in] */ DWORD dwEffects)
//{ //{
// return E_NOTIMPL; // return E_NOTIMPL;
//}*/ //}*/
@ -195,22 +192,22 @@ public:
virtual ULONG STDMETHODCALLTYPE AddRef() {return ++m_cRefCount;} virtual ULONG STDMETHODCALLTYPE AddRef() {return ++m_cRefCount;}
virtual ULONG STDMETHODCALLTYPE Release(); virtual ULONG STDMETHODCALLTYPE Release();
bool QueryDrop(DWORD grfKeyState, LPDWORD pdwEffect); bool QueryDrop(DWORD grfKeyState, LPDWORD pdwEffect);
virtual HRESULT STDMETHODCALLTYPE DragEnter( virtual HRESULT STDMETHODCALLTYPE DragEnter(
/* [unique][in] */ IDataObject __RPC_FAR *pDataObj, /* [unique][in] */ IDataObject __RPC_FAR *pDataObj,
/* [in] */ DWORD grfKeyState, /* [in] */ DWORD grfKeyState,
/* [in] */ POINTL pt, /* [in] */ POINTL pt,
/* [out][in] */ DWORD __RPC_FAR *pdwEffect); /* [out][in] */ DWORD __RPC_FAR *pdwEffect);
virtual HRESULT STDMETHODCALLTYPE DragOver( virtual HRESULT STDMETHODCALLTYPE DragOver(
/* [in] */ DWORD grfKeyState, /* [in] */ DWORD grfKeyState,
/* [in] */ POINTL pt, /* [in] */ POINTL pt,
/* [out][in] */ DWORD __RPC_FAR *pdwEffect); /* [out][in] */ DWORD __RPC_FAR *pdwEffect);
virtual HRESULT STDMETHODCALLTYPE DragLeave(); virtual HRESULT STDMETHODCALLTYPE DragLeave();
virtual HRESULT STDMETHODCALLTYPE Drop( virtual HRESULT STDMETHODCALLTYPE Drop(
/* [unique][in] */ IDataObject __RPC_FAR *pDataObj, /* [unique][in] */ IDataObject __RPC_FAR *pDataObj,
/* [in] */ DWORD grfKeyState, /* [in] */ DWORD grfKeyState,
/* [in] */ POINTL pt, /* [in] */ POINTL pt,
/* [out][in] */ DWORD __RPC_FAR *pdwEffect); /* [out][in] */ DWORD __RPC_FAR *pdwEffect);
}; };
/// implementation of IDragSourceHelper interface /// implementation of IDragSourceHelper interface
@ -222,10 +219,10 @@ public:
DragSourceHelper() DragSourceHelper()
{ {
if (FAILED(CoCreateInstance(CLSID_DragDropHelper, if (FAILED(CoCreateInstance(CLSID_DragDropHelper,
NULL, NULL,
CLSCTX_INPROC_SERVER, CLSCTX_INPROC_SERVER,
IID_IDragSourceHelper, IID_IDragSourceHelper,
(void**)&pDragSourceHelper))) (void**)&pDragSourceHelper)))
pDragSourceHelper = NULL; pDragSourceHelper = NULL;
} }
@ -239,7 +236,7 @@ public:
} }
// IDragSourceHelper // IDragSourceHelper
HRESULT InitializeFromBitmap(HBITMAP hBitmap, HRESULT InitializeFromBitmap(HBITMAP hBitmap,
POINT& pt, // cursor position in client coords of the window POINT& pt, // cursor position in client coords of the window
RECT& rc, // selected item's bounding rect RECT& rc, // selected item's bounding rect
IDataObject* pDataObject, IDataObject* pDataObject,
@ -249,19 +246,19 @@ public:
if (pDragSourceHelper == NULL) if (pDragSourceHelper == NULL)
return E_FAIL; return E_FAIL;
SHDRAGIMAGE di; SHDRAGIMAGE di;
BITMAP bm; BITMAP bm;
GetObject(hBitmap, sizeof(bm), &bm); GetObject(hBitmap, sizeof(bm), &bm);
di.sizeDragImage.cx = bm.bmWidth; di.sizeDragImage.cx = bm.bmWidth;
di.sizeDragImage.cy = bm.bmHeight; di.sizeDragImage.cy = bm.bmHeight;
di.hbmpDragImage = hBitmap; di.hbmpDragImage = hBitmap;
di.crColorKey = crColorKey; di.crColorKey = crColorKey;
di.ptOffset.x = pt.x - rc.left; di.ptOffset.x = pt.x - rc.left;
di.ptOffset.y = pt.y - rc.top; di.ptOffset.y = pt.y - rc.top;
return pDragSourceHelper->InitializeFromBitmap(&di, pDataObject); return pDragSourceHelper->InitializeFromBitmap(&di, pDataObject);
} }
HRESULT InitializeFromWindow(HWND hwnd, POINT& pt,IDataObject* pDataObject) HRESULT InitializeFromWindow(HWND hwnd, POINT& pt,IDataObject* pDataObject)
{ {
if (pDragSourceHelper == NULL) if (pDragSourceHelper == NULL)
return E_FAIL; return E_FAIL;