Thank you for your reply! Ok so I figured out how to do the mirroring within same Window, something like this: <Canvas x:Name="RendererCanvas" Background="White" Grid.Column="1" Grid.Row="1" > <v:RenderView x:Name="Renderer" Width="300" Height="300" /> </Canvas> <Grid Grid.Column="0" Grid.Row="1" Background="DarkGray"> <Viewbox Stretch="Uniform" DataContext="{Binding ElementName=Renderer}"> <Grid Width="{Binding Width}" Height="{Binding Height}"> <Grid.Background> <VisualBrush Stretch="Uniform" Visual="{Binding}" /> </Grid.Background> </Grid> </Viewbox> </Grid> Now, would it be possible to do exact same thing but in 2 different windows? So 2 XAML files one binding another. Maybe with some static fields? -- Just think in 10 dimensions!

Thanks again. So basically I started the C# Wrapper to be able to compare it, after a few days and going to battle vs COM objets and performant InterOp, I finally managed to wrap a part of it. For now I'm doing just the D3DDevice creation and a simple window clear. I compared the exactly same function calls with Managed DirectX 1.1 ones (actually everything is the same, I compared every method parameter and call with PIX debugger). So creating D3D factory, creating a device and showing. (Just a first draft) DirectX.Device.Clear(0, null, ClearFlags.D3DCLEAR_TARGET | ClearFlags.D3DCLEAR_ZBUFFER, 0, 1, 0); DirectX.Device.BeginScene(); // todo DirectX.Device.EndScene(); DirectX.Device.Present(null, null, IntPtr.Zero, null); And guess what, the performance are almost exactly the same between MDX and my C# Wrapper. I'm getting around 2180 FPS with both of them. I still would like to check IL code generated for both. -- Everything is possible, even the impossible! ^_^

Kel_ wrote: I'm sure there's something like nanosleep in win32 kernel mode. No, there isn't. A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007

I'm writing a differed tasks framework for an application, intercepting computer shutdown and launching a form to execute planified tasks. ^^ Security sandbox is framework 3 only feature? -- Everything is possible, even the impossible! ^_^