hpux man page for xchangepointercontrol

XChangePointerControl() 												   XChangePointerControl()

Name
  XChangePointerControl - change the pointer preferences.

Synopsis
  XChangePointerControl(display, do_accel, do_threshold, accel_numerator, accel_denominator, threshold)
	Display *display;
	Bool do_accel, do_threshold;
	int accel_numerator, accel_denominator;
	int threshold;

Arguments
  display   Specifies a connection to an X server; returned from XOpenDisplay().

  do_accel  Specifies  a  boolean  value that controls whether the values for the accel_numerator or accel_denominator are set.  You can pass
	    one of these constants:  True or False.

  do_threshold
	    Specifies a boolean value that controls whether the value for the threshold is set.  You can pass one of these  constants:	 True
	    or False.

  accel_numerator
	    Specifies the numerator for the acceleration multiplier.

  accel_denominator
	    Specifies the denominator for the acceleration multiplier.

  threshold Specifies the acceleration threshold.  True or False.

Description
  XChangePointerControl()  defines  how  the  pointing	device functions.  The acceleration is a fraction (accel_numerator/accel_denominator)
  which specifies how many times faster than normal the sprite on the screen moves for a given pointer movement.  Acceleration	takes  effect
  only	when  a  particular  pointer motion is greater than threshold pixels at once, and only applies to the motion beyond threshold pixels.
  The values for do_accel and do_threshold must be True for the pointer values to be set; otherwise, the parameters will be unchanged.	 Set-
  ting any of the last three arguments to -1 restores the default for that argument.

  The fraction may be rounded arbitrarily by the server.

Errors
  BadValue  accel_denominator is 0.
	    Negative value for do_accel or do_threshold.

See Also
  XChangeActivePointerGrab(),  XGetPointerControl(),  XGetPointerMapping(),  XGrabPointer(),  XQueryPointer(), XSetPointerMapping(), XUngrab-
  Pointer(), XWarpPointer().

Xlib - Pointers 													   XChangePointerControl()