private static IAccessible GetFocusedAccessibleWindowFromHandle()

        IntPtr hwnd = GetFocusedWindow();

            GETFOCUSEDGROUP          = (FIRST + 93),

static extern IntPtr GetFocus();

Private Shared Function GetFocus() As IntPtr

public static Control GetFocusedControl()

    IntPtr focusedHandle = GetFocus();

IntPtr ptrFocus = GetFocus();

public static IntPtr GetFocus() {

        static IntPtr GetFocusedHandle()

            Console.WriteLine("Currently Focused Window: {0}", GetFocusedHandle());