Lines - where are they?

Hi all,
Does anyone know how I can draw a Line on a Form like you can in VB6? What is the .NET equivalent, I can't seem to find it?

Thanks for your time
:)

VB Code:

Imports System
Imports System.Windows.Forms
Imports System.Drawing
Public Module modmain
   Sub Main()
      'The KPD-Team 2001
      'URL: [url]http://www.allapi.net/dotnet/[/url]
      'E-Mail: [email][email protected][/email]
      Dim theForm as MainForm = new MainForm()
      theForm.Size = new Size(500, 350)
      theForm.Text = "Visual Basic.NET"
      theForm.ShowDialog()
   End Sub
End Module
Public Class MainForm
Inherits Form
   Protected Overrides Sub OnPaint(e as PaintEventArgs)
      e.Graphics.Clear(Me.BackColor)
      e.Graphics.DrawLine(new Pen(Color.Blue), 0, 0, Me.ClientSize.Width, Me.ClientSize.Height)
   End Sub
End Class

the answer like the guy up said is GDI+...that means graphic device interface that is what makes about all graphics in windows

u can find it in the Drawing and Drawing2d namespaces

thanks guys :)