Don't think there is an IoStream for Arduino but it depends which board you are using?

Hi,

Arduino is gcc c++ and each board (or group of boards) have published tool chains. For example the Arduino Uno and Mega use the AVR toolchain.

You will see that each type of arduino board also has an "arduino core". If you click "vMicro>show hidden files" (with a project open) you will see the core added as short cuts to the project.

I think some extra confusion comes from the fact that we currently hijack/override the standard visual studio c++ system which will incorrectly show some normal windows c++ includes as being available.

Microsoft has released Clang compiler for Visual Studio so we will shortly switch intellisense to a much better system.