button_state
struct button_state _bev_d_event;
CONFIG_HOOK_SHARE, button_state, sc);
static int button_state(void *, int, long, void *);
static struct button_state bstate[MOUSE_MAXBUTTON]; /* button state */
static struct button_state *mstate[MOUSE_MAXBUTTON];/* mapped button st.*/
static struct button_state zstate[4]; /* Z/W axis state */