Returns or sets the selection mode in the charts of the specified chart control. When this property is True, the first click selects the inner object; the second click selects the outer object. For example, if this property is True and the user clicks the third data point in a data series, only that point is selected. The second time that the user clicks the data point, the entire data series is selected. Setting this property to False forces the entire data series to be selected when the user clicks the third data point for the first time. The user has to click the third data point a second time in order to select only that data point. The default value it True. Read/write Boolean.
expression Required. An expression that returns a ChartSpace object.