BACKGROUNDHANDLERFLAGS

BACKGROUNDHANDLERFLAGS_NONE	None.
BACKGROUNDHANDLERFLAGS_VIEWREDRAW	View redraw.
BACKGROUNDHANDLERFLAGS_EDITORRENDDER	Editor render.
BACKGROUNDHANDLERFLAGS_MATERIALPREVIEW	Material preview.
BACKGROUNDHANDLERFLAGS_RENDEREXTERNAL	Render external.
BACKGROUNDHANDLERFLAGS_PRIVATE_VIEWREDRAW	Private.
BACKGROUNDHANDLERFLAGS_SHUTDOWN	Shutdown.