how to access and set bits in a byte array?

[dsicon]

bArrRGBData.0[offset]

thanks
ok i think i get that
but
bArrRGBData.0[8]
starts at the 9th bit (?), but what does it return ?
oh
maybe i have a bit var
bitvar = bArrRGBData.0[8]
is that how to do it ?
and is 9th correct? i.e. the [offset] starts counting from 0 ?
thanks for your help