A few years ago, I wrote a program that would screen-scrape to read all cards showing and then do a Monte Carlo simulation to randomly complete the hand and compute what % of times my cards would win (along with pot odds). It took a second or so to do the simulation, so I could use it to make decisions in real time. It was a fun project, but I soon stopped using it. Your odds against random cards are not at all your actual odds, because most players fold weaker cards. What matters most is who you're playing against.
Playing poker using bots is cheating. BTW, you must understand that if the business has profit, it cannot be easily forbidden. Using 'friendly' bots in poker rooms is a nature of poker boom supporting. Moreover, beating bots is not a problem for advanced players. BTW, there are a lot of newbies that cry about money lost in playing with 'bots'.
Anyway, the article, although it describes well the techniques for programmatically interacting with a poker client, is majorly misleading because this is not the hard part of making a bot. The hard part is figuring out whether, and how much, to bet. He alludes to this as 'the million dollar question', but then omits to even mention it under 'What skills will I need to write a bot?' Perhaps he'll address this in later articles?
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If you look at the last screen shot, it's clear that he built a UI for an end-user to specify the actual logic for poker play. ('Call if it has not been raised, I'm later than 7th', etc.) His 'bot' doesn't actually make decisions. It collects rules from an end-user, calls those to decide what to do, and passes the result on to the poker client. In other words, the hard part of the job - writing a program to play poker - has been sloughed off to somebody else. Maybe that somebody else is the author, creating the algorithm through his UI... but then why not just code it?
There are serious researchers who have made credible bots (he links to them), bots which doubtless would (and, for all we know, do) make a lot of money on poker sites. But when I looked at it, the literature was not nearly detailed enough to code up their algorithms. (Also, they were working with simplified versions of poker, since full no-limit holdem is a hard nut to crack). What they didn't use were the 'extensible rules-based systems' which this author claims 'are a lot more powerful than you think'. Count me skeptical. Good players eat such systems for snacks. Maybe they make money in low-stakes games against bad players, but I'd like to see evidence.
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In short: never mind the dll injection, show us your bankroll over 100,000 hands!