Imports C1.Win.C1Chart

・・・

Private test As Image

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
　　Dim series As ChartDataSeries = C1Chart1.ChartGroups.Group0.ChartData.SeriesList(0)
　　series.SymbolStyle.Shape = SymbolShapeEnum.None
　　test = Image.FromFile("..¥..¥img1.png")
End Sub

Private Sub C1Chart1_Paint(sender As System.Object, e As System.Windows.Forms.PaintEventArgs) Handles C1Chart1.Paint
　　Dim target As Integer = 0
　　Dim max As Integer = C1Chart1.ChartGroups.Group0.ChartData.SeriesList(target).PointData.Length
　　For i As Integer = 0 To max - 1
　　　　Dim rect As Rectangle = C1Chart1.ChartGroups.Group0.DataIndexToRect(target, i)
　　　　rect.Inflate(5, 5)
　　　　e.Graphics.DrawImage(test, rect)
　　Next
End Sub

using C1.Win.C1Chart;

・・・

private Image test;

private void Form1_Load(object sender, EventArgs e)
{
　　ChartDataSeries series = c1Chart1.ChartGroups.Group0.ChartData.SeriesList[0];
　　series.SymbolStyle.Shape = SymbolShapeEnum.None;
　　test = Image.FromFile("..¥¥..¥¥img1.png");
　　c1Chart1.Paint += new PaintEventHandler(c1Chart1_Paint);
}　　
　　　　
private void c1Chart1_Paint(object sender, PaintEventArgs e)
{
　　int target = 0;
　　int max = c1Chart1.ChartGroups.Group0.ChartData.SeriesList[target].PointData.Length;
　　for (int i = 0; i < max; i++)
　　{
　　　　Rectangle rect = c1Chart1.ChartGroups.Group0.DataIndexToRect(target, i);
　　　　rect.Inflate(5, 5);
　　　　e.Graphics.DrawImage(test, rect);
　　}
}