_nc_set_screen
_nc_set_screen(sp);
_nc_set_screen(save_SP);
_nc_set_screen(sp);
_nc_set_screen(save_SP);
_nc_set_screen(0);
_nc_set_screen(current);
_nc_set_screen(CURRENT_SCREEN);
_nc_set_screen(SP_PARM);
_nc_set_screen(0);
#define ReturnScreenError() do { _nc_set_screen(0); \
_nc_set_screen(sp);
_nc_set_screen(0);
_nc_set_screen(screenp);
extern NCURSES_EXPORT(void) _nc_set_screen (SCREEN *);
_nc_set_screen(&fake_sp);
_nc_set_screen(save_SP);
_nc_set_screen(SCREEN *sp)
_nc_set_screen(sp);
_nc_set_screen(save_sp);