|| Specifies the connection to the X server.
|| Returns an array of bytes that identifies which keys are pressed down.
Each bit represents one key of the keyboard.
function returns a bit vector for the logical state of the keyboard,
where each bit set to 1 indicates that the corresponding key is currently
The vector is represented as 32 bytes.
Byte N (from 0) contains the bits for keys 8N to 8N + 7
with the least-significant bit in the byte representing key 8N.
Note that the logical state of a device (as seen by client applications)
may lag the physical state if device event processing is frozen.
"Keyboard and Pointer Settings".
Christophe Tronche, email@example.com