C++ DLL API integration Debugging(no new code req'd)

I am a C# developer and I need to integrate a C# web service into an application that allows Windows DLL calls from within its own scripting language. The application is Tradestation (a stock trading program) and I have put together a standard C++ DLL that wraps calls to my C# code (that calls the web service). Perhaps because of marshalling across these different app domains or for whatever reason, the calls aren't getting through to my C# code and I need help finding the problem. I am not well versed in C++ and I need help. The source is very short, only a few lines of code, but the coder needs to have experience in the EXPORT logic of exposing the C++ code as a Windows (not COM!) DLL. Also C# experience would be helpful. Alternatively, the coder can simply re-write the entire code in pure C++, it would probably have to reference .NET in order to consume the web service. You decide what is easier and quicker. Either solution is acceptable. ## Deliverables Rent A Coder requirements notice: As originally posted, this bid request does not have complete details. Should a dispute arise and this project go into arbitration "as is", the contract's vagueness might cause it to be interpreted against you, even though you were acting in good-faith. So for your protection, if you are interested in this project, please work-out and document the requirements onsite. 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows 2000 and XP running Tradestation 2000i, 7 or 8 (or later version).