c# - Take screen shot of behind the window -

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I am preparing a WPF application that has Arrow glass effect and works in Windows 8 (where we use it Can not pick actual Aero using Windows> DwmExtendFrameIntoClientArea .) - To do this I need to take a snapshot of this area without my application without my application (and then blurred effects on that image apply the)! I am using Graphics.CopyFromScreen , but it includes the screen with my application. I can not reduce the window, since this image is being rebuilt in every 100 messages.
How can I get this functionality? (I am using .NET 4.0)

you win32 api rout



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