PaneSizeMode Enumeration

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

private void Form1_Load(object sender, EventArgs e) {
    // Create a new chart. 
    ChartControl chartControl1 = new ChartControl();

    // Create two series. 
    Series series1 = new Series("Series 1", ViewType.Bar);
    Series series2 = new Series("Series 2", ViewType.Line);

    // Add points to them, with their arguments different. 
    series1.Points.Add(new SeriesPoint("A", 10));
    series1.Points.Add(new SeriesPoint("B", 12));
    series1.Points.Add(new SeriesPoint("C", 17));
    series1.Points.Add(new SeriesPoint("D", 14));
    series2.Points.Add(new SeriesPoint("I", 2500));
    series2.Points.Add(new SeriesPoint("II", 3800));
    series2.Points.Add(new SeriesPoint("III", 1500));
    series2.Points.Add(new SeriesPoint("IV", 1300));

    // Add both series to the chart. 
    chartControl1.Series.AddRange(new Series[] { series1, series2 });

    // Hide the legend (optional). 
    chartControl1.Legend.Visible = false;

    // Cast the chart's diagram to the XYDiagram type,  
    // to access its axes and panes. 
    XYDiagram diagram = (XYDiagram)chartControl1.Diagram;

    // Add secondary axes to the diagram, and adjust their options. 
    diagram.SecondaryAxesX.Add(new SecondaryAxisX("My Axis X"));
    diagram.SecondaryAxesY.Add(new SecondaryAxisY("My Axis Y"));
    diagram.SecondaryAxesX[0].Alignment = AxisAlignment.Near;
    diagram.SecondaryAxesY[0].Alignment = AxisAlignment.Near;

    // Add a new additional pane to the diagram. 
    diagram.Panes.Add(new XYDiagramPane("My Pane"));

    // Assign both the additional pane and, if required, 
    // the secondary axes to the second series.  
    LineSeriesView myView = (LineSeriesView)series2.View;
    myView.AxisX = diagram.SecondaryAxesX[0];
    myView.AxisY = diagram.SecondaryAxesY[0];
    // Note that the created pane has the zero index in the collection, 
    // because the existing Default pane is a separate entity. 
    myView.Pane = diagram.Panes[0];

    // Customize the layout of the diagram's panes. 
    diagram.PaneDistance = 10;
    diagram.PaneLayoutDirection = PaneLayoutDirection.Horizontal;
    diagram.DefaultPane.SizeMode = PaneSizeMode.UseWeight;
    diagram.DefaultPane.Weight = 1.2;

    // Add the chart to the form. 
    chartControl1.Dock = DockStyle.Fill;
    this.Controls.Add(chartControl1);
}

Imports System
Imports System.Drawing
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 chartControl1 As New ChartControl()

    ' Create two series. 
    Dim series1 As New Series("Series 1", ViewType.Bar)
    Dim series2 As New Series("Series 2", ViewType.Line)

    ' Add points to them, with their arguments different. 
    series1.Points.Add(New SeriesPoint("A", 10))
    series1.Points.Add(New SeriesPoint("B", 12))
    series1.Points.Add(New SeriesPoint("C", 17))
    series1.Points.Add(New SeriesPoint("D", 14))
    series2.Points.Add(New SeriesPoint("I", 2500))
    series2.Points.Add(New SeriesPoint("II", 3800))
    series2.Points.Add(New SeriesPoint("III", 1500))
    series2.Points.Add(New SeriesPoint("IV", 1300))

    ' Add both series to the chart. 
    chartControl1.Series.AddRange(New Series() { series1, series2 })

    ' Hide the legend (optional). 
    chartControl1.Legend.Visible = False 

    ' Cast the chart's diagram to the XYDiagram type,  
    ' to access its axes and panes. 
    Dim diagram As XYDiagram = CType(chartControl1.Diagram, XYDiagram)

    ' Add secondary axes to the diagram, and adjust their options. 
    diagram.SecondaryAxesX.Add(New SecondaryAxisX("My Axis X"))
    diagram.SecondaryAxesY.Add(New SecondaryAxisY("My Axis Y"))
    diagram.SecondaryAxesX(0).Alignment = AxisAlignment.Near
    diagram.SecondaryAxesY(0).Alignment = AxisAlignment.Near

    ' Add a new additional pane to the diagram. 
    diagram.Panes.Add(New XYDiagramPane("My Pane"))

    ' Assign both the additional pane and, if required, 
    ' the secondary axes to the second series.  
    Dim myView As LineSeriesView = CType(series2.View, LineSeriesView)
    myView.AxisX = diagram.SecondaryAxesX(0)
    myView.AxisY = diagram.SecondaryAxesY(0)
    ' Note that the created pane has the zero index in the collection, 
    ' because the existing Default pane is a separate entity. 
    myView.Pane = diagram.Panes(0)

    ' Customize the layout of the diagram's panes. 
    diagram.PaneDistance = 10
    diagram.PaneLayoutDirection = PaneLayoutDirection.Horizontal
    diagram.DefaultPane.SizeMode = PaneSizeMode.UseWeight
    diagram.DefaultPane.Weight = 1.2

    ' Add the chart to the form. 
    chartControl1.Dock = DockStyle.Fill
    Me.Controls.Add(chartControl1)
End Sub