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Editorial Team
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Asked: 2026-05-20T12:54:59+00:00

I need to capture the entire screen with a transparent WPF window as the

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I need to capture the entire screen with a transparent WPF window as the topmost window.
I tried 2 approaches:

  1. using System.Windows.Drawing.Graphics.CopyFromScreen
  2. using WINAPI GetDesktopWindow

Both methods yield the same result. I get the entire screen EXCEPT my topmost transparent WPF window.
The WPF window w is created with:

w.AllowsTransparency = true;
w.WindowStyle = System.Windows.WindowStyle.None;
w.Background = new SolidColorBrush( Color.FromArgb( 1, 0, 0, 0 ) );
w.Topmost = true;

plus some content of course. The window covers the entire screen surface.

Apparently, the WPF window draws on a surface that is not included in GetDesktopWindow.

Can anybody pls shed some light on this and share some ideas how to truly get the entire screen surface?

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1 Answer

  1. Editorial Team

    Just found the solution:

    As far as I can tell there is no solution for the Graphics.CopyFromScreen approach because you’d need to OR CopyPixelOperation.CaptureBlt with CopyPixelOperation.SourceCopy but you can’t. The usual M$ inconsistency madness…

    However, the WINAPI approach works since you can combine SRCCOPY and CAPTUREBLT when using BitBlt. Without CAPTUREBLT transparent and layered windows will not be included.

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