Reading bit from word

Reading bit from word

Hello everybody.
I'm not so sure if it's really dumb question, but I will ask anyway:
Am I able to read and/or change single bit in whole which is external? I'd like to make status displays on words and visibility is based on value limits, not a single bit.... I could make it with combined element, but I have plenty of things to show from one word.... And it's hell of a work with combined element.
But I can't imagine I couldn't refer to single bit in word....

This is a migrated post! Originally posted on 19.12.2014 by user kuki. Please be aware that information can be outdated.