Многопоточность

Привет! Итак.Я получаю ОЛЕ-интерфейс RichEdit-a из из другого потоко обращаюсь к нему.
Вот так я его получаю :


IRichEditOle *RichEditOle;
//.....
SendMessage(hwnd,EM_GETOLEINTERFACE,0,(LPARAM)&RichEditOle);



А потом использую следующий класс (Думаю, многим он покажется знакомым.Его метод CImageDataObject::InsertBitmap(IRichEditOle* pRichEditOle, HBITMAP hBitmap) я использую из второго потока. ):



class CImageDataObject : IDataObject
{
public:
// This static fumction accepts those parameters:
// IRichEditOle* : a pointer to IRochEditOle interface for the RichEdit Control
// HBITMAP : the bitmap handle.
//
// After calling the function, it inserts the image in the current
// position of the RichEdit
//
static void InsertBitmap(IRichEditOle* pRichEditOle, HBITMAP hBitmap);

private:
ULONG m_ulRefCnt;
BOOL m_bRelease;

// The data being bassed to the richedit
//
STGMEDIUM m_stgmed;
FORMATETC m_fromat;

public:
CImageDataObject() : m_ulRefCnt(0)
{
m_bRelease = FALSE;
}

~CImageDataObject()
{
if (m_bRelease)
::ReleaseStgMedium(&m_stgmed);
}

// Methods of the IUnknown interface
//
STDMETHOD(QueryInterface)(REFIID iid, void ** ppvObject)
{
if (iid == IID_IUnknown || iid == IID_IDataObject)
{
*ppvObject = this;
AddRef();
return S_OK;
}
else
return E_NOINTERFACE;
}
STDMETHOD_(ULONG, AddRef)(void)
{
m_ulRefCnt++;
return m_ulRefCnt;
}
STDMETHOD_(ULONG, Release)(void)
{
if (--m_ulRefCnt == 0)
{
delete this;
}

return m_ulRefCnt;
}

// Methods of the IDataObject Interface
//
STDMETHOD(GetData)(FORMATETC *pformatetcIn, STGMEDIUM *pmedium) {
HANDLE hDst;
hDst = ::OleDuplicateData(m_stgmed.hBitmap, CF_BITMAP, NULL);
if (hDst == NULL)
{
return E_HANDLE;
}

pmedium->tymed = TYMED_GDI;
pmedium->hBitmap = (HBITMAP)hDst;
pmedium->pUnkForRelease = NULL;

return S_OK;
}
STDMETHOD(GetDataHere)(FORMATETC* pformatetc, STGMEDIUM* pmedium ) {
return E_NOTIMPL;
}
STDMETHOD(QueryGetData)(FORMATETC* pformatetc ) {
return E_NOTIMPL;
}
STDMETHOD(GetCanonicalFormatEtc)(FORMATETC* pformatectIn ,FORMATETC* pformatetcOut ) {
return E_NOTIMPL;
}
STDMETHOD(SetData)(FORMATETC* pformatetc , STGMEDIUM* pmedium , BOOL fRelease ) {
m_fromat = *pformatetc;
m_stgmed = *pmedium;

return S_OK;
}
STDMETHOD(EnumFormatEtc)(DWORD dwDirection , IEnumFORMATETC** ppenumFormatEtc ) {
return E_NOTIMPL;
}
STDMETHOD(DAdvise)(FORMATETC *pformatetc, DWORD advf, IAdviseSink *pAdvSink,
DWORD *pdwConnection) {
return E_NOTIMPL;
}
STDMETHOD(DUnadvise)(DWORD dwConnection) {
return E_NOTIMPL;
}
STDMETHOD(EnumDAdvise)(IEnumSTATDATA **ppenumAdvise) {
return E_NOTIMPL;
}

// Some Other helper functions
//
void SetBitmap(HBITMAP hBitmap);
IOleObject *GetOleObject(IOleClientSite *pOleClientSite, IStorage *pStorage);

};


void CImageDataObject::InsertBitmap(IRichEditOle* pRichEditOle, HBITMAP hBitmap)
{
SCODE sc;

// Get the image data object
//
CImageDataObject *pods = new CImageDataObject;
LPDATAOBJECT lpDataObject;

pods->QueryInterface(IID_IDataObject, (void **)&lpDataObject);
pods->SetBitmap(hBitmap);

// Get the RichEdit container site
//
IOleClientSite *pOleClientSite;

pRichEditOle->GetClientSite(&pOleClientSite);
// Initialize a Storage Object
//
IStorage *pStorage;

LPLOCKBYTES lpLockBytes = NULL;
sc = ::CreateILockBytesOnHGlobal(NULL, TRUE, &lpLockBytes);

sc = ::StgCreateDocfileOnILockBytes(lpLockBytes,
STGM_SHARE_EXCLUSIVE|STGM_CREATE|STGM_READWRITE, 0, &pStorage);


// The final ole object which will be inserted in the richedit control
//
IOleObject *pOleObject;
pOleObject = pods->GetOleObject(pOleClientSite, pStorage);

// all items are "contained" -- this makes our reference to this object
// weak -- which is needed for links to embedding silent update.
OleSetContainedObject(pOleObject, TRUE);

// Now Add the object to the RichEdit
//
REOBJECT reobject;
ZeroMemory(&reobject, sizeof(REOBJECT));
reobject.cbStruct = sizeof(REOBJECT);

CLSID clsid;
sc = pOleObject->GetUserClassID(&clsid);


reobject.clsid = clsid;
reobject.cp = REO_CP_SELECTION;
reobject.dvaspect = DVASPECT_CONTENT;
reobject.poleobj = pOleObject;
reobject.polesite = pOleClientSite;
reobject.pstg = pStorage;

// Insert the bitmap at the current location in the richedit control
//
pRichEditOle->InsertObject(&reobject);

// Release all unnecessary interfaces
//
pOleObject->Release();
pOleClientSite->Release();
pStorage->Release();
lpDataObject->Release();
}

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

void CImageDataObject::SetBitmap(HBITMAP hBitmap)
{


STGMEDIUM stgm;
stgm.tymed = TYMED_GDI; // Storage medium = HBITMAP handle
stgm.hBitmap = hBitmap;
stgm.pUnkForRelease = NULL; // Use ReleaseStgMedium

FORMATETC fm;
fm.cfFormat = CF_BITMAP; // Clipboard format = CF_BITMAP
fm.ptd = NULL; // Target Device = Screen
fm.dwAspect = DVASPECT_CONTENT; // Level of detail = Full content
fm.lindex = -1; // Index = Not applicaple
fm.tymed = TYMED_GDI; // Storage medium = HBITMAP handle

this->SetData(&fm, &stgm, TRUE);
}

IOleObject *CImageDataObject::GetOleObject(IOleClientSite *pOleClientSite, IStorage *pStorage)
{


SCODE sc;
IOleObject *pOleObject;
sc = ::OleCreateStaticFromData(this, IID_IOleObject, OLERENDER_FORMAT,
&m_fromat, pOleClientSite, pStorage, (void **)&pOleObject);

return pOleObject;
}



Я испоьзую

OleInitialize(NULL);

И вызываю метод...
Тока вот на месте изображения - просто белый квадрат. В дебаге проверял - вроде все параметры
правильные. Может, здесь нужно применять "маршалинг" ? Тока Для OLE-интерфейса RichEdit-a, который я получаю - маршалинг не нужен, а в класс я передаю дискриптор BMP-шки...