Maybe you need to read
the rules. (Memory Editing Section Rules) This section is for intermediate to advanced programmers and it is expected that you search before you ask for information. As has been mentioned there is plenty of information about how to read and use the descriptors as this is how it was done from the beginning all the way to legion before they removed it from retail.
Asking the same question over and over and only asking to be spoon-fed (as you do after checking your posts) will only annoy people here and will make us less likely to help you.