Manpages - XSetDeviceMode.3

XSetDeviceMode - change the mode of a device

  #include <X11/extensions/XInput.h>

  XSetDeviceMode( Display *display,
                  XDevice *device,
                  int mode);

  display
         Specifies the connection to the X server.

  device
         Specifies the device whose mode is to be changed.

  mode
         Specifies the mode. You can pass Absolute, or Relative.

    The XSetDeviceMode request changes the mode of an input device
    that is capable of reporting either absolute positional
    information or relative motion information. Not all input
    devices are capable of reporting motion data, and not all are
    capable of changing modes from Absolute to Relative.

    XSetDeviceMode can generate a BadDevice or BadMode error.

    BadDevice
           An invalid device was specified. The specified device
           does not exist or has not been opened by this client via
           XOpenInputDevice. This error may also occur if some
           other client has caused the specified device to become
           the X keyboard or X pointer device via the
           XChangeKeyboardDevice or XChangePointerDevice requests.

    BadMatch
           This error may occur if an XSetDeviceMode request is
           made specifying a device that has no valuators and
           reports no axes of motion.

    BadMode
           An invalid mode was specified. This error will also be
           returned if the specified device is not capable of
           supporting the XSetDeviceMode request.