private static bool IsAppWindow(IntPtr hWnd)
        {
            if ((GetWindowLong(hWnd, (int)EnumGWLIndex.GWL_STYLE) & (int)EnumWindowsStyle.WS_SYSMENU) == 0)
            {
                return(false);
            }

            if (DllUser32.IsWindowVisible(hWnd))
            {
                if ((GetWindowLong(hWnd, (int)EnumGWLIndex.GWL_EXSTYLE) & (int)EnumWindowsStyleEx.WS_EX_TOOLWINDOW) != 0)
                {
                    return(false);
                }

                var hwndOwner = DllUser32.GetWindow(hWnd, (int)EnumGetWindowConstants.GW_OWNER);
                return((GetWindowLong(hwndOwner, (int)EnumGWLIndex.GWL_STYLE) &
                        ((int)EnumWindowsStyle.WS_VISIBLE | (int)EnumWindowsStyle.WS_CLIPCHILDREN)) !=
                       ((int)EnumWindowsStyle.WS_VISIBLE | (int)EnumWindowsStyle.WS_CLIPCHILDREN) ||
                       (GetWindowLong(hwndOwner, (int)EnumGWLIndex.GWL_EXSTYLE) & (int)EnumWindowsStyleEx.WS_EX_TOOLWINDOW) != 0);
            }

            return(false);
        }