+extern Session *sesslist;
+
+/* from macdlg.c */
+extern void mac_newsession(void);
+extern void mac_dupsession(void);
+extern void mac_savesession(void);
+extern void mac_savesessionas(void);
+extern void mac_clickdlg(WindowPtr, EventRecord *);
+extern void mac_activatedlg(WindowPtr, EventRecord *);
+/* from macterm.c */
+extern void mac_opensession(void);
+extern void mac_startsession(Session *);
+extern void mac_pollterm(void);
+extern void mac_activateterm(WindowPtr, Boolean);
+extern void mac_adjusttermcursor(WindowPtr, Point, RgnHandle);
+extern void mac_adjusttermmenus(WindowPtr);
+extern void mac_updateterm(WindowPtr);
+extern void mac_clickterm(WindowPtr, EventRecord *);
+extern void mac_growterm(WindowPtr, EventRecord *);
+extern void mac_keyterm(WindowPtr, EventRecord *);
+extern void mac_menuterm(WindowPtr, short, short);
+extern void mac_closeterm(WindowPtr);
+/* from macstore.c */
+extern OSErr get_putty_dir(Boolean makeit, short *pVRefNum, long *pDirID);
+extern OSErr get_session_dir(Boolean makeit, short *pVRefNum, long *pDirID);
+extern void *open_settings_r_fsp(FSSpec *);
+extern void *open_settings_w_fsp(FSSpec *);
+/* from macucs.c */
+extern void init_ucs(Session *);
+/* from macnet.c */
+extern void sk_poll(void);
+/* from mtcpnet.c */
+extern OSErr mactcp_init(void);
+extern void mactcp_cleanup(void);
+extern void mactcp_poll(void);
+extern SockAddr mactcp_namelookup(char const *, char **);
+extern SockAddr mactcp_nonamelookup(char const *);
+extern void mactcp_getaddr(SockAddr, char *, int);
+extern int mactcp_hostname_is_local(char *);
+extern int mactcp_address_is_local(SockAddr);
+extern int mactcp_addrtype(SockAddr);
+extern void mactcp_addrcopy(SockAddr, char *);
+extern void mactcp_addr_free(SockAddr);
+extern Socket mactcp_register(void *, Plug);
+extern Socket mactcp_new(SockAddr addr, int, int, int, int, Plug);
+extern Socket mactcp_newlistener(char *, int, Plug, int);
+extern char *mactcp_addr_error(SockAddr);
+/* from otnet.c */
+extern OSErr ot_init(void);
+extern void ot_cleanup(void);
+extern void ot_poll(void);
+extern SockAddr ot_namelookup(char const *, char **);
+extern SockAddr ot_nonamelookup(char const *);
+extern void ot_getaddr(SockAddr, char *, int);
+extern int ot_hostname_is_local(char *);
+extern int ot_address_is_local(SockAddr);
+extern int ot_addrtype(SockAddr);
+extern void ot_addrcopy(SockAddr, char *);
+extern void ot_addr_free(SockAddr);
+extern Socket ot_register(void *, Plug);
+extern Socket ot_new(SockAddr addr, int, int, int, int, Plug);
+extern Socket ot_newlistener(char *, int, Plug, int);
+extern char *ot_addr_error(SockAddr);
+/* Apple Event Handlers (in various files) */
+extern pascal OSErr mac_aevt_oapp(const AppleEvent *, AppleEvent *, long);
+extern pascal OSErr mac_aevt_odoc(const AppleEvent *, AppleEvent *, long);
+extern pascal OSErr mac_aevt_pdoc(const AppleEvent *, AppleEvent *, long);
+extern pascal OSErr mac_aevt_quit(const AppleEvent *, AppleEvent *, long);
+