Bonsoir,
http://toshyp.atari.org/en/008007.html#evnt_button
ev_bkstate 	On return contains the status of the 'special' keys of the
keyboard when the event occurred:
0x001 	= 	Right [Shift]
0x002 	= 	Left [Shift]
0x004 	= 	[Control]
0x008 	= 	[Alternate]
Some functions could not be called with the Ctrl key and CapsLock
activated. In XaAES, it seems bit 4 of ev_bkstate is set when CapsLock
key is enabled: not yet documented in the TOS.HYP or is this addition
canceled in new updates ? I use XaAES 1.2.1beta. Other new bits are used?