-extern int error_handler(Display *dsply, XErrorEvent *e);
-extern void send_message(Window w, Atom a, long value);
-extern int win_proto(Window w);
-extern void quit(void *aux);
+extern void quit(Arg *arg);
+extern int xerror(Display *dsply, XErrorEvent *ee);
+extern void sendevent(Window w, Atom a, long value);
+extern int getproto(Window w);
+
+/* tag.c */
+extern Client *getnext(Client *c);
+extern void settags(Client *c);
+extern void dofloat(Arg *arg);
+extern void dotile(Arg *arg);
+extern void view(Arg *arg);
+extern void appendtag(Arg *arg);
+extern void replacetag(Arg *arg);