OT: OWA drag and drop

Does anyone know how the OWA drag and drop functionality works? We are trying 
to replicate that functionality but have hit a wall.... Or is it possible to 
modify the OWA web pages?

Basically to be able to drag-and-drop database displayed records into a 
database generated folder structure and on the drop function, have the back-end 
database update the appropriate record.... much like OWA supports.

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