expression.Marker
expression Required. An expression that returns a ChSeries object.
Example
This example sets the chart type and then sets the marker type and interior color for the specified series.
Sub SetMarkerStyle()
Dim chConstants
Dim serSeries1
Set chConstants = ChartSpace1.Constants
Set serSeries1 = ChartSpace1.Charts(0).SeriesCollection(0)
ChartSpace1.Charts(0).Type = chConstants.chChartTypeLineMarkers
serSeries1.Marker.Style = chConstants.chMarkerStyleSquare
serSeries1.Interior.Color = "blue"
End Sub