enum _PRL_MOUSE_BUTTON {
  PMB_NOBUTTON = 0,
  PMB_LEFT_BUTTON = 1<<0,
  PMB_RIGHT_BUTTON = 1<<1,
  PMB_MIDDLE_BUTTON = 1<<2,
  PMB_XBUTTON1 = 1<<3,
  PMB_XBUTTON2 = 1<<4,
  PMB_XBUTTON3 = 1<<5,
  PMB_XBUTTON4 = 1<<6,
  PMB_XBUTTON5 = 1<<7,
  PMB_BUTTONS_MASK = 0xff,
  PMB_PEN_IN_RANGE = 1<<8,
  PMB_PEN_TIP = 1<<9,
  PMB_PEN_BARREL = 1<<10,
  PMB_PEN_INVERT = 1<<11,
  PMB_PEN_ERASE = 1<<12,
  PMB_PEN_MASK = 0xff00
};