SHOW is the never syntax for VISIBLE, but it has the same effect. I think it is confusing that conitec changed that. (they said it would be easier to understand for beginners)

they declared it to be obsolete now: http://www.conitec.net/beta/aAnhang_Syntax.htm

The 2 definitions in atypes.h:
Code:
#define SHOW			(1<<14)
#define VISIBLE			SHOW