PokerStars few years ago was a perfect place to host your servants robots but now they are not welcome anymore. If you are an experienced user in this field you probably end up with the conclusion that using bots on theyr site has become risky because of the too many security methods added over time. I have been an avid player here and decided to give rise to such a terminator to dominate anyone to make me rich while playing "Mario Bros" and indeed i did and then i was at one step to end up with my account suspended. So in case you did not know this list shows all the methods PokerStars uses at the current moment to detect bot activity (the list was confirmed using OllyDbg, IDAPro, some monitoring software and from other users experience, forums):

• They send you a CAPTCHA CODE blocking the access to PRINTSCREEN function
• They monitor your reaction time
• They save the speed and path of your mouse and where you click in every activity performed
• They evaluate your play pattern from theyr hand history database
• They resize the table to check if your program returns an error message by your OCR function or if you stop playing
• They draw random pixels on the cards for the same reason as for the resize
• They monitor sessions gameplay time
• They monitor every API function wich is either a GDI related or HOOKING
• They monitor all your processes standard os messages (in case your bot comes with an error popup)
• They intercept simulated keystrokes wich are not coming from your fingers (in case you use HOT-KEYS)
• They monitor all your unknown processes and sends you an email asking to provide details about them (even the source code)
• Finally they take snapshots from your screen privately

So if you manage to pass all of this you will still land at the CAPTCHA or on the reply button when you should provide informations about your "unknown software". Injecting your code into another process address space doesen't work anymore as they monitor system event hooks wich makes your process still visible to them.