using System;
using System.Drawing;
using System.Windows.Forms;
using DevExpress.XtraReports.UI;
using DevExpress.XtraPrinting.Shape;
//...

private void button1_Click(object sender, EventArgs e) {
    XtraReport1 report = new XtraReport1();

    // Create a shape control.
    XRShape shape = new XRShape();

    // Set the shape's type to Line.
    shape.Shape = new ShapeLine();

    // Adjust the Line shape's main properties.
    shape.Angle = 45;
    shape.Width = 200;
    shape.Height = 200;
    shape.ForeColor = Color.Brown;
    shape.Stretch = false;

    // Preview the report.
    report.Detail.Controls.Add(shape);
    report.ShowPreview();
}

Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports DevExpress.XtraReports.UI
Imports DevExpress.XtraPrinting.Shape
'...

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) _
Handles button1.Click
    Dim report As New XtraReport1()

    ' Create a shape control.
    Dim shape As New XRShape()

    ' Set the shape's type to Line.
    shape.Shape = New ShapeLine()

    ' Adjust the Line shape's main properties.
    shape.Angle = 45
    shape.Width = 200
    shape.Height = 200
    shape.ForeColor = Color.Brown
    shape.Stretch = False

    ' Preview the report.
    report.Detail.Controls.Add(shape)
    report.ShowPreview()
End Sub