string getExtent()

This method returns the current bounding box of the view, in the form of a comma-separated list of coordinates, as follows: Southwest x,Southwest y,Northeast x,Northeast y.  The coordinates are relative to the Exchange Coordinate System, unless the map type is NRMR (See Map Types) in which case they are relative to the map's coordinate system.  Note that if the Exchange Coordinate System is geodetic, the x-values are longitudes and the y-values are latitudes.