We target .NET Standard 2.0 so you can use .NET Framework 4.6.1+ or .NET Core 2.0+. Simply add a reference to the Spark Nuget package to get started.
dotnet new console -lang c# dotnet add package spark_sdk dotnet build
The easiest way to get started with C++ is to use the Spark Server SDK to develop your application. Follow the instructions to download and install the Spark Server SDK and open the client_sdk sample project. If you want to run your C++ Client SDK application on Windows contact us to get the required headers and binaries.
We use JavaScript internally with the Spark Client API over a websocket connection but the documentation and packaging isn't ready yet. If this is something you're interested in get in touch with us at api@bluetradesys.com.