Status XkbGetState(Display *display,unsigned int device_spec,XkbStatePtr state_return);
connection to the X server
device ID, or XkbUseCoreKbd
backfilled with Xkb state
function queries the server for the current keyboard state, waits
for a reply, and then backfills
with the results.
All group values are expressed as group indices in the range [0..3]. Modifiers
and the compatibility modifier state values are expressed as the bitwise union
of the core X11 modifier masks. The pointer button state is reported as in the
core X11 protocol.