I write IB API applications in C++ all the time, many with GUI. I have no problems at all due to the blocking calls or Unicode.
Also, I recommend using the "TwsApiCpp" class library here:
https://github.com/JanBoonen/TwsApiCpp
I use this exclusively in my apps for IB API connectivity.
Also, I recommend using the "TwsApiCpp" class library here:
https://github.com/JanBoonen/TwsApiCpp
I use this exclusively in my apps for IB API connectivity.
