Gets or sets a 
Northwoods.GoXam.Part, not being dragged, that the mouse is over, and sets its 
Northwoods.GoXam.Part.IsDropOntoAccepted property appropriately.
 
            
            
            
            
            
            
            
            protected Part DragOverPart {get; set;}
             
        
             
        
            
            
            Property Value
This property is both used and set by 
DragOver and 
DropOnto, as long as 
DropOntoEnabled is true.