ActiveSync DragDrop

I would like to drag and copy files from my program's implementation of a RAPI-derived explorer to MS's ActiveSync Explorer.

I've identified the IDataObject FORMATETCs and data structures though I cannot duplicate them precisely (it seems that the data associated with the cfstr_filegroupdescriptor formatetc is actually "nested" within the HGLOBAL of the "HPCFileGroupDescriptor" - something I do not know how to do).

In my COleDragSource-derived class, I've implemented OnRenderFileData, which works when dragging mobdev files to any non-remote locations in Windows Explorer.  ActiveSync Explorer, on the other hand, will reject the IDataObject in its OnDragEnter mechanism.  Oddly though - Windows Explorer (Mobile Device virual folder) will recognize the IDataObject as a valid drop source, but then will do nothing with OnDrop.

Could someone lend me a hand with this   Maybe even some code samples if possible