static extern void OleConvertOLESTREAMToIStorage(ref OLESTREAM lpolestream, IStorage pstg, IntPtr ptd);
static extern void OleConvertOLESTREAMToIStorage( ref OLESTREAM lpolestream, IStorage pstg, IntPtr ptd);
public static extern int OleConvertIStorageToOLESTREAM(ref IStorage pstg, ref OLESTREAM lpolestream);
public static extern int OleConvertIStorageToOLESTREAMEx(ref IStorage pstg, ushort cfFormat, int lWidth, int lHeight, uint dwSize, ref tagSTGMEDIUM pmedium, ref OLESTREAM polestm);
public static extern int OleConvertOLESTREAMToIStorage(ref OLESTREAM lpolestream, ref IStorage pstg, ref tagDVTARGETDEVICE ptd);
public static extern int OleConvertOLESTREAMToIStorageEx(ref OLESTREAM polestm, ref IStorage pstg, ref ushort pcfFormat, ref int plwWidth, ref int plHeight, ref uint pdwSize, ref tagSTGMEDIUM pmedium);