extern void raise_window (saver_info *si,
Bool inhibit_fade, Bool between_hacks_p,
Bool dont_clear);
-extern void blank_screen (saver_info *si);
+extern Bool blank_screen (saver_info *si);
extern void unblank_screen (saver_info *si);
-extern Bool grab_keyboard_and_mouse (saver_info *si, Window, Cursor);
-extern void ungrab_keyboard_and_mouse (saver_info *si);
/* =======================================================================
locking