drag and drop on a bound DataGridView

Question

I am wanting to implement drag-and-drop on my DataGridView.  I have found several examples of how to do this: most are similar to this: http://www.timvw.be/drag-and-drop-on-a-datagridview/

The problem I have though is that my grid is bound to a data source. Does anyone have an example of how to drag and drop within the same grid that is bound to a data source?

tia