Gets or sets the name of the column that contains the URL associated with each map feature.
Returns an empty string if this property does not apply. If this property is modified successfully, it automatically sets the layer's rebuild flag to True. See Rebuild for details.
Note that for write operations, this property does not work during a busy state. For additional information, refer to "Handling Busy State and Map Refresh" chapter in the Autodesk MapGuide Developer's Guide.
-1 (busy): For write operations only.