Drawing in VB.NET question

OK, the following code will take a BMP file and draw it to a main form dialog window. HOW do I make it draw to the dekstop background on my screen instead of onto the form dialog? Take out the "Inherits Form"?

By the way, I DONT want to change the wallpaper, just draw over the current one. Is this possible? Kinda like an overlay.

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.ShowDialog()
   End Sub
End Module
Public Class MainForm
Inherits Form
   Dim BackGround as new Bitmap("C:\Windows\Bubbles.bmp")
   Protected Overrides Sub OnPaint(e as PaintEventArgs)
      e.Graphics.DrawImage(BackGround, new Point(0, 0))
   End Sub
End Class

-- Ethan --
www.ethan-c-allen.com

You may be able to make the form transparent. Then do your drawing.

When I did this before in vb6, I used to use the GDI BitBlt function with GetDesktopWindow + GetWindowHDC. This should still work in vb .net

BTW, any ideas on how to do this with GDI+?