Drawing on Windows desktop below icons

I need to draw an animation (let's say a GIF) on desktop. So, I need a function that draws on desktop, behind the desktop icons. The main requirement is that the painting should be done flickerles UNDER the desktop icons. These are the requirements: * The painting should be under desktop icons * Should work with modern operating systems (Win XP and up). On Win 7 it should work also when Aero themes are enabled. * Do not use DirectX (if you want to use DirectX/DirectDraw, please inform me first to approve it) * Do not use ActiveDesktop * Flickerless. The desktop/icons should not flicker. The animation/video should plays smoothly at a minimum 30 fps * The program should not hinder other applications or the usual way in which the user interacts with the desktop. Hints: The code for XP is not difficult. You can find it on internet. The problem is Win 7. Microsoft changed desktop's structure in Win 7. As an example, here is a program that already does what I want: www . desktopanimated .com. Maybe you can use WinDoze or ApiMonitor to see how they are doing it. Deliverable: * Delphi XE source code * Some documentation * A very small application (and source code) that demonstrates that the function works. Nothing fancy. It should paint a series of 3-4 BMPs to simulate the animation. Please don't post bids over the maximum amount accepted.