SeriesLines Object (PowerPoint)
Represents series lines in a chart group.
Series lines connect the data values from each series. Only 2-D stacked bar, 2-D stacked column, pie-of-pie, or bar-of-pie charts can have series lines. This object is not a collection. There is no object that represents a single series line; you either enable series lines for all points in a chart group or you disable them.
If the HasSeriesLines property is False, most properties of the SeriesLines object are disabled.
Although the following code applies to Microsoft Word, you can readily modify it to apply to PowerPoint.
Use the SeriesLines property to return a SeriesLines object. The following example adds series lines to chart group one in embedded chart one on worksheet one (the chart must be a 2-D stacked bar or column chart).