When should WS_EX_NOREDIRECTIONBITMAP be used?

Question

MSDN says (Extended Window Styles):

WS_EX_NOREDIRECTIONBITMAP: The window does not render to a redirection surface. This is for windows t

Answer 1

WS_EX_NOREDIRECTIONBITMAP is for windows that use DirectComposition for rendering.

E.g. Sciter creates windows with WS_EX_NOREDIRECTIONBITMAP to support Acrylic composition effects like here:

This is an ordinary Win32 window (not UWP) that uses DirectComposition and WS_EX_NOREDIRECTIONBITMAP.

Rendering on such windows should be done by Direct2D means. GDI rendering is barely useful with WS_EX_NOREDIRECTIONBITMAP.