The following example uses the dc returned from GetDc(0) with the Windows API drawing functions to draw on the Windows Desktop.

Example:

procedure TForm .Button Click(Sender: TObject); var dc : hdc; begin dc := GetDc(0); MoveToEx(Dc, 0, 0, nil); LineTo(Dc, 300, 300); ReleaseDc(0, Dc); end;

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