redhat man page for xchangepointerdevice

XChangePointerDevice(3X11)					    X FUNCTIONS 					XChangePointerDevice(3X11)

NAME
       XChangePointerDevice - change which device is the X pointer

SYNTAX
       Status XChangePointerDevice(display, device xaxis, yaxis)
	     Display *display;
	     XDevice *device;
	     int xaxis;
	     int yaxis;

ARGUMENTS
       display	   Specifies the connection to the X server.

       device	   Specifies the device to be used as the X pointer.

       xaxis	   Specifies the axis of the device to be used as the X pointer x-axis.

       yaxis	   Specifies the axis of the device to be used as the X pointer y-axis.

DESCRIPTION
       The  XChangePointerDevice  request causes the server to use the specified device as the X pointer.  The device must have been opened by the
       client via XOpenDevice or a BadDevice error will result.  The device must support input class Valuators or a BadMatch  error  will  result.
       If the implementation does not support use of the specified device as the X pointer, a BadDevice error will result.

       If  the	specified device is grabbed by another client, AlreadyGrabbed is returned.  If the specified device is frozen by a grab on another
       device, GrabFrozen is returned.	If the request is successful, Success is returned.

       If the request succeeds, a ChangeDeviceNotify event is sent to all clients that have selected  that  event.   A	MappingNotify  event  with
       request	=  MappingPointer  is  sent  to all clients.  The specified device becomes the X pointer, and the old X pointer becomes accessible
       through the input extension protocol requests.

       XChangePointerDevice can generate a BadDevice or a BadMatch error.

DIAGNOSTICS
       BadDevice   An invalid device was specified.  The specified device does not exist, has not been opened by this client via XOpenInputDevice,
		   or  is  already  one of the core X input devices (pointer or keyboard).  This error may also occur if the server implementation
		   does not support using the specified device as the X pointer.

       BadMatch    This error may occur if an XChangePointerDevice request was made specifying a device that has less than two valuators, or spec-
		   ifying a valuator index beyond the range supported by the device.

SEE ALSO
       XChangeKeyboardDevice
       Programming With Xlib

X Version 11							    Release 6.6 					XChangePointerDevice(3X11)