ChartArea Object (Word)
Represents the chart area of a chart.
The chart area includes everything, including the plot area. However, the PlotArea object has its own formatting, so formatting the plot area does not format the chart area.
Use the ChartArea property to return the ChartArea object.
The following example turns off the border for the chart area in the first chart of the active document.
ChartArea.Format.Line.Visible = False