I have used a couple of softwares to connect tradestation to TWS. One had a few bugs, the author sold a few hundred copies, cracked versions became available and he stopped supporting it. The other one is free but it seems to break with TWS upgrades, not certain about that really but I found a thread where several people were having troubles with it. This is the weakest link in my technical trading stuff. I have been told that Power Basic is a very good way to produce DLL's and ActiveX stuff. My question is: how hard will it be for somebody that can do Easy Language and VBA and is familiar with Basic to write an interface between TS and TWS??