The following example changes the appearance of the lines for all series in a three-dimensional line chart.
Private Sub Command1_Click()
Dim serX As Series
' Change the chart type to 3D line and smoothing
' each line.
MSChart1.chartType = VtChChartType3dLine
MSChart1.ColumnCount = 4
For Each serX In MSChart1.Plot.SeriesCollection
serX.ShowGuideLine(VtChAxisIdY) = True
serX.GuideLinePen.Style = VtPenStyleDitted
serX.Pen.Style = 4
Next
End Sub