+#ifdef WINDOWSNT
+/* Keyboard hooks. */
+extern void setup_w32_kbdhook (void);
+extern void remove_w32_kbdhook (void);
+extern int check_w32_winkey_state (int);
+#define w32_kbdhook_active (os_subtype != OS_9X)
+#else
+#define w32_kbdhook_active 0
+#endif
+