a \helpref{wxDataObject}{wxdataobject} must be associated with the drop target
and this data object will be responsible for the format negotiation between
the drag source and the drop target. If all goes well, then \helpref{OnData}{wxdroptargetondata}
will get called and the wxDataObject belonging to the drop target can get
filled with data.
\item {\bf The end:} After processing the data, DoDragDrop() returns either
a \helpref{wxDataObject}{wxdataobject} must be associated with the drop target
and this data object will be responsible for the format negotiation between
the drag source and the drop target. If all goes well, then \helpref{OnData}{wxdroptargetondata}
will get called and the wxDataObject belonging to the drop target can get
filled with data.
\item {\bf The end:} After processing the data, DoDragDrop() returns either