public uint GetData(ref FORMATETC pFormatetc, ref STGMEDIUM pMedium)
{
IntPtr hDst = mBitmap.GetHbitmap();
pMedium.tymed = (int)TYMED.TYMED_GDI;
pMedium.unionmember = hDst;
pMedium.pUnkForRelease = IntPtr.Zero;
return (uint)S_OK;
}
public uint SetData(ref FORMATETC a, ref STGMEDIUM b, bool fRelease)
{
//mpFormatetc = pFormatectIn;
//mpmedium = pmedium;
Trace.WriteLine("SetData");
return (int)S_OK;
}
public uint GetCanonicalFormatEtc(ref FORMATETC pFormatetcIn, out FORMATETC pFormatetcOut)
{
Trace.WriteLine("GetCanonicalFormatEtc");
pFormatetcOut = new FORMATETC();
return (uint)E_NOTIMPL;
}
public uint QueryGetData(ref FORMATETC pFormatetc)
{
Trace.WriteLine("QueryGetData");
return (uint)E_NOTIMPL;
}
public uint GetDataHere(ref FORMATETC pFormatetc, out STGMEDIUM pMedium)
{
Trace.WriteLine("GetDataHere");
pMedium = new STGMEDIUM();
return (uint)E_NOTIMPL;
}
public bool InsertImageFromFile(string strFilename)
{
//-----------------------
ILockBytes pLockBytes;
CreateILockBytesOnHGlobal(IntPtr.Zero, true, out pLockBytes);
IStorage pStorage;
StgCreateDocfileOnILockBytes(pLockBytes, (uint)(STGM.STGM_SHARE_EXCLUSIVE|STGM.STGM_CREATE|STGM.STGM_READWRITE), 0, out pStorage);
IOleClientSite pOleClientSite;
this.IRichEditOle.GetClientSite(out pOleClientSite);
//-----------------------
//-----------------------
FORMATETC formatEtc = new FORMATETC();
formatEtc.cfFormat = 0;
formatEtc.ptd = IntPtr.Zero;
formatEtc.dwAspect = DVASPECT.DVASPECT_CONTENT;
formatEtc.lindex = -1;
formatEtc.tymed = TYMED.TYMED_NULL;
Guid IID_IOleObject = new Guid("{00000112-0000-0000-C000-000000000046}");
Guid CLSID_NULL = new Guid("{00000000-0000-0000-0000-000000000000}");
object pOleObjectOut;
// I don't sure, but it appears that this function only loads from bitmap
// You can also try OleCreateFromData, OleLoadPictureIndirect, etc.
int hr = OleCreateFromFile(ref CLSID_NULL, strFilename, ref IID_IOleObject, (uint)OLERENDER.OLERENDER_DRAW, ref formatEtc, pOleClientSite, pStorage, out pOleObjectOut);
if (pOleObjectOut == null)
{
Marshal.ReleaseComObject(pLockBytes);
Marshal.ReleaseComObject(pOleClientSite);
Marshal.ReleaseComObject(pStorage);
return false;
}
IOleObject pOleObject = (IOleObject)pOleObjectOut;
//-----------------------
//-----------------------
Guid guid = new Guid();
//guid = Marshal.GenerateGuidForType(pOleObject.GetType());
pOleObject.GetUserClassID(ref guid);
//-----------------------
//-----------------------
OleSetContainedObject(pOleObject, true);
REOBJECT reoObject = new REOBJECT();
reoObject.cp = this._richEdit.TextLength;
reoObject.clsid = guid;
reoObject.pstg = pStorage;
reoObject.poleobj = Marshal.GetIUnknownForObject(pOleObject);
reoObject.polesite = pOleClientSite;
reoObject.dvAspect = (uint)(DVASPECT.DVASPECT_CONTENT);
reoObject.dwFlags = (uint)(REOOBJECTFLAGS.REO_BELOWBASELINE);
reoObject.dwUser = 0;
this.IRichEditOle.InsertObject(reoObject);
//-----------------------
//-----------------------
Marshal.ReleaseComObject(pLockBytes);
Marshal.ReleaseComObject(pOleClientSite);
Marshal.ReleaseComObject(pStorage);
Marshal.ReleaseComObject(pOleObject);
//-----------------------
return true;
}
static extern int OleCreateLinkFromData([MarshalAs(UnmanagedType.Interface)]IDataObject pSrcDataObj, [In] ref Guid riid, uint renderopt, ref FORMATETC pFormatEtc, IOleClientSite pClientSite, IStorage pStg, [MarshalAs(UnmanagedType.IUnknown)] out object ppvObj);
static extern int OleCreateFromFile([In] ref Guid rclsid, [MarshalAs(UnmanagedType.LPWStr)] string lpszFileName, [In] ref Guid riid, uint renderopt, ref FORMATETC pFormatEtc, IOleClientSite pClientSite, IStorage pStg, [MarshalAs(UnmanagedType.IUnknown)] out object ppvObj);
public myDataObject()
{
mBitmap = new Bitmap(16, 16);
mpFormatetc = new FORMATETC();
}
public uint DAdvise(ref FORMATETC a, int advf, IAdviseSink pAdvSink, out uint pdwConnection)
{
Trace.WriteLine("DAdvise");
pdwConnection = 0;
return (uint)E_NOTIMPL;
}