#define MPLEX_ATTACH_SWITCHTO 0x0001 /* switch to region */
#define MPLEX_ATTACH_UNNUMBERED 0x0002 /* do not put on mut.ex list */
#define MPLEX_ATTACH_HIDDEN 0x0004 /* should be hidden */
#define MPLEX_ATTACH_SWITCHTO 0x0001 /* switch to region */
#define MPLEX_ATTACH_UNNUMBERED 0x0002 /* do not put on mut.ex list */
#define MPLEX_ATTACH_HIDDEN 0x0004 /* should be hidden */