Nostalrius Begins - Quality wow vanilla realm (1.12)

I'm looking at maybe trying to create a simple UI addon that will let me add players to a list with a tag of DNH (Do Not Help) above their head and next to their name, and also in the chat box.

My reasoning for this is that there are a lot of players that are not helpful in any way and I would like to keep track of these players so I can return the favor ever so subtly.

I suppose I could also add a KOS (Kill On Sight) function for enemy players as well.

I am using Addon Studio for creating addons. This is an addon for the Microsoft Visual Studio, so you have a powerful IDE to handle your LUA coding.
Link: https://addonstudio.codeplex.com/




Also, WowBench can be usefull when developing addons. It is more hardcore since it requires some basic knowledge on the WoW event flow. Basically this is a console-based World of Warcraft simulator, which emulates events and messages.
The benefit here is you can test your code without launching WoW.
Link: http://armory.digam.dk/?sa=download.file.info&p1=11&p2=85


Finally http://wowprogramming.com/docs/api_categories is a very good source to explore the WoW API, just note that this is updated for retail WoW, so only a part of the API list is actually supported in Vanilla.

Thank you very much for the resources.