XGetPointerControl(display, accel_numerator_return, accel_denominator_return, 
                       threshold_return)
      Display *display;
      int *accel_numerator_return, *accel_denominator_return;
      int *threshold_return;
| display | Specifies the connection to the X server. | 
| accel_numerator_return | Returns the numerator for the acceleration multiplier. | 
| accel_denominator_return | Returns the denominator for the acceleration multiplier. | 
| threshold_return | Returns the acceleration threshold. |