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CentOS 7.0 - man page for xchangepointerdevice (centos section 3)

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XCHANGEPOINTERDEVICE(3) 						  XCHANGEPOINTERDEVICE(3)

NAME
       XChangePointerDevice - change which device is the X pointer

SYNOPSIS
       #include <X11/extensions/XInput.h>

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

       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 specifying a valuator index beyond the
		  range supported by the device.

SEE ALSO
	   XChangeKeyboardDevice(3)

					    03/09/2013			  XCHANGEPOINTERDEVICE(3)
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