Window screenshot using WinAPI?

PictureBox. Handle is a window handle, not a DC handle. There are several guides online for doing screenshots.

One is here . See also @In silico's answer.

You can also take screenshot using purely managed code without the need for interop. The following code will take a snap of a 100x100 area of the screen, of course you can adjust to the full screen. The key function is Graphics.CopyFromScreen.

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