Goal
I want to be able to access AutoCAD's Color chooser from an external application. This means that I will not be using AutoCAD to make the color chooser dialog popup. Instead, I will be using a VB.Net application to manage these colors.
Current Situation
As for now, I have no idea where to start. Do I need to import a specific library to make this work? Is it even possible to do this without AutoCAD running?
If you are going to be doing this without AutoCAD, then you need to roll your own. There might be an RGB - ACI translation function out there for display purposes, otherwise you could just build your own map.