guint gdk_keymap_lookup_key ( GdkKeymap* keymap, const GdkKeymapKey* key )
Looks up the keyval mapped to a keycode/group/level triplet.
If no keyval is bound to
key, returns 0. For normal user input,
you want to use
gdk_keymap_translate_keyboard_state() instead of
this function, since the effective group/level may not be
the same as the current keyboard state.
GdkKeymapKeywith keycode, group, and level initialized.
The data is owned by the caller of the method.