Previous method of hiding the windows (SW_HIDE and SWP_HIDEWINDOW) would
completely remove the window from the taskbar, which would lead to
unexpected behavior for some people. set_cloak allows the hidden
windows to still be present in the task bar.

Other discussions on the topic: Ciantic/AltTabAccessor#1

One common source for crashes when using the COM library cloaking is the
get_view_for_hwnd function from IApplicationViewCollection. For a lot of
windows, getting a view is not possible (Outlook splash screen, OneDrive
quit screen, etc). In the situations where the view can't be acquired,
windows are essentially ignored.

…r` interface

…iding