The fields that can be unified in
)unifies T with
)unifies S with the serial number of the last request processed by the server.
)unifies B, a boolean value, with one of
)unifies D with the ProXL Display the event was read from.
)unifies W with the ProXL Window that was reported in the immediately preceding
)unifies K with a list of 32 8-bit integers, for a total of 256 bits, where each bit represents the state of the corresponding keycode. Use
key_state/2to interpret the results.