There r some I save in my favorites but have not tried: http://www.traderclub.com/discus/ http://www.traderslaboratory.com/forums/ http://www.moneytec.com/forums/ http://www.tradingblox.com/forum/index.php http://www.siliconinvestor.com/msgboardmain.aspx http://www.aussiestockforums.com/forums/index.php? u can check if they provide more programming posts.
<i>"2+2 maintains a very respectable intellectual level... Primarily because the mods do not allows "play money" players to take over... and idiots are put in their place without delay."</i> Does that mean <b>2+2</b> newbies are free to ask honest questions while veteran traders there can offer plain answers without being harrased by pretenders, or the entire thread being instantly high-jacked? What a concept!!!
If you want a C++ forum maybe it's better if you don't look for something related to trading. If you have your trading knowledge and you know what you want from your code it doesn't matter where your C++ knowledge comes from. Otherwise you can look at wilmott.com. It's mostly for quants, but there is also a software forum with some C++ threads. I like trade2win too, but not much C++ there.
I had a buddy ask a hooker once "Where are all the good looking women?" He got a rock upside his head.
This is the most active board on futures and options tading, as far as I can tell. You might also try theoptionsinsider.com the futures and options forum on yahoo finance tfccharts.com whatstrading.com (new) ino.com insidefutures.com