Erik De Laet wrote:

> I found the bin_and and bin_or UDF in the Firebird installation. But
> how about the ~pMask.
> I can't simply negate the mask ( -pMask ), can I ?

I don't know if there is XOR, but to negate can also XOR with 11111111

--
Milan Babuskov
http://www.flamerobin.org