basic OSC tutorial in C++? what library to use?

We are using oscpack as a cross plattform osc library.

https://code.google.com/archive/p/oscpack/downloads

we are using it with Linux, Windows and MacOSX and are quite happy. It's simple to use and works well.

The OSC Library is written in C++, but an ActiveX control is included that can be used from most Windows development environments (such as VisualBasic). Also, the OSC Library has been ported to Delphi

http://www.hammersound.net/osc.html