Getting Active Window Coordinates and Height Width in C#

Question

I just check in some of the posts here, but none were helpful to me.

The thing I am trying to do is to run a background process of Screen Capturing. Now I want a piece

Answer 1

    [DllImport("user32.dll")]
    private static extern bool SetProcessDPIAware();
    [DllImport("user32.dll")]
    static extern IntPtr GetForegroundWindow();
    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool GetWindowRect(IntPtr hWnd, out Rectangle lpRect);

    static void Main()
    {
        SetProcessDPIAware();
        Rectangle t2;
        GetWindowRect(GetForegroundWindow(),out t2);
    }