CONST
     button_a=_control;
     button_b=_alt;
     button_x=_x;
     button_y=_z;
     button_l=_backspace;
     button_r=_tab;
     button_vol_plus=_s;
     button_vol_minus=_a;
     button_start=_enter;
     button_select=_space;
     button_click=_c;
