I really don't understand what you're trying to do. Are you trying to make your own custom client that communicates with other clients? If that's the case, look into how bitcoin communicates with other clients over tcp. Alternately, run your own bitcoin instance and query that.
That is it, I've been considering making my own personal client for learning and I know i've asked this before but got around 10-15 frustrated people wondering what i was talking about I believe they referred me to that page you showed me as I've seen it 1000 times and have it booked marked but I needed someone to say "This is the points of interest for what your accomplishing" instead of "Here is a full page of everything about bitcoin here ya go!", so now I know where to look and I know others were asking this question as well and seem to be in the same state of mind as me on how to go about this. thanks this is what in needed
Is it TCP commands RPC what?