OLE Attachments

Attachments that are OLE objects are encoded as OLE 1 stream objects for backward compatability with Microsoft Mail 3.x. If the original object is really an OLE 2 IStorage object, then the object must be converted to an OLE 1 stream. This conversion is performed using the OleConvertIStorageToOLESTREAM function, which is part of the Win32 OLE libraries; examples of this conversion can be found in the OLE Programmer's Reference.