On Fri, 31 Mar 2017 14:07:09 +0200 Andrea Mauri <andrea.mauri.75 at gmail.com> wrote: > I didn't understand how TBits.NotBits works. AFAIK a.NotBits(b) means (a and not b): a b result 0 0 0 0 1 0 1 0 1 1 1 0 Mattias