using System;
using System.Windows.Forms;
using DevExpress.XtraCharts;
// ...

private void Form1_Load(object sender, EventArgs e) {
    // Create a new chart.
    ChartControl StepLineChart3D = new ChartControl();

    // Add a step line series to it.
    Series series1 = new Series("Series 1", ViewType.StepLine3D);

    // Add points to the series.
    series1.Points.Add(new SeriesPoint("A", 12));
    series1.Points.Add(new SeriesPoint("B", 4));
    series1.Points.Add(new SeriesPoint("C", 17));
    series1.Points.Add(new SeriesPoint("D", 7));
    series1.Points.Add(new SeriesPoint("E", 12));
    series1.Points.Add(new SeriesPoint("F", 4));
    series1.Points.Add(new SeriesPoint("G", 17));
    series1.Points.Add(new SeriesPoint("H", 7));

    // Add the series to the chart.
    StepLineChart3D.Series.Add(series1);

    // Access labels of the series.
    ((Line3DSeriesLabel)series1.Label).Visible = true;
    ((Line3DSeriesLabel)series1.Label).ResolveOverlappingMode =
        ResolveOverlappingMode.Default;

    // Access the series options.
    series1.PointOptions.PointView = PointView.ArgumentAndValues;

    // Customize the view-type-specific properties of the series.
    StepLine3DSeriesView myView = (StepLine3DSeriesView)series1.View;
    myView.LineWidth = 5;
    myView.LineThickness = 4;

    // Access the diagram's options.
    ((XYDiagram3D)StepLineChart3D.Diagram).RuntimeRotation = true;
    ((XYDiagram3D)StepLineChart3D.Diagram).RotationType = 
        RotationType.UseMouseStandard;

    // Add a title to the chart and hide the legend.
    ChartTitle chartTitle1 = new ChartTitle();
    chartTitle1.Text = "3D Step Line Chart";
    StepLineChart3D.Titles.Add(chartTitle1);
    StepLineChart3D.Legend.Visible = false;

    // Add the chart to the form.
    StepLineChart3D.Dock = DockStyle.Fill;
    this.Controls.Add(StepLineChart3D);
}

Imports System
Imports System.Windows.Forms
Imports DevExpress.XtraCharts
' ...

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
    ' Create a new chart.
    Dim StepLineChart3D As New ChartControl()

    ' Add a step line series to it.
    Dim series1 As New Series("Series 1", ViewType.StepLine3D)

    ' Add points to the series.
    series1.Points.Add(New SeriesPoint("A", 12))
    series1.Points.Add(New SeriesPoint("B", 4))
    series1.Points.Add(New SeriesPoint("C", 17))
    series1.Points.Add(New SeriesPoint("D", 7))
    series1.Points.Add(New SeriesPoint("E", 12))
    series1.Points.Add(New SeriesPoint("F", 4))
    series1.Points.Add(New SeriesPoint("G", 17))
    series1.Points.Add(New SeriesPoint("H", 7))

    ' Add the series to the chart.
    StepLineChart3D.Series.Add(series1)

    ' Access labels of the series.
    CType(series1.Label, Line3DSeriesLabel).Visible = True
    CType(series1.Label, Line3DSeriesLabel).ResolveOverlappingMode = ResolveOverlappingMode.Default

    ' Access the series options.
    series1.PointOptions.PointView = PointView.ArgumentAndValues

    ' Customize the view-type-specific properties of the series.
    Dim myView As StepLine3DSeriesView = CType(series1.View, StepLine3DSeriesView)
    myView.LineWidth = 5
    myView.LineThickness = 4

    ' Access the diagram's options.
    CType(StepLineChart3D.Diagram, XYDiagram3D).RuntimeRotation = True
    CType(StepLineChart3D.Diagram, XYDiagram3D).RotationType = RotationType.UseMouseStandard

    ' Add a title to the chart and hide the legend.
    Dim chartTitle1 As New ChartTitle()
    chartTitle1.Text = "3D Step Line Chart"
    StepLineChart3D.Titles.Add(chartTitle1)
    StepLineChart3D.Legend.Visible = False

    ' Add the chart to the form.
    StepLineChart3D.Dock = DockStyle.Fill
    Me.Controls.Add(StepLineChart3D)
End Sub