The DataMap object consists of a set of read-only properties that describe how a data set is mapped. It exists only for data sets that have data maps created through the user interface or with the DisplayDataMap method on the DataSet object. Most of the properties are exposed in the user interface through the Data Mapping Wizard. With the exception of the LegendTitle property, you must use the DisplayDataMap method to set these properties. This object is invalidated after the map is closed.