Expand description
Absolute Pointer Protocol
Provides a simple method for accessing absolute pointer devices. This includes devices such as touch screens and digitizers. The Absolute Pointer Protocol allows information about a pointer device to be retrieved. The protocol is attached to the device handle of an absolute pointer device, and can be used for input from the user in the preboot environment.
Supported devices may return 1, 2, or 3 axis of information. The Z axis may optionally be used to return pressure data measurements derived from user pen force.
All supported devices must support a touch-active status. Supported devices may optionally support a second input button, for example a pen side-button.