RTX Developer Note
The RTX C++ SDK has been improved for Version 12.6. One of the improvements will require minor source code changes when you upgrade to Version 12.6 of Investor/RT and build with the latest irtsdk.h SDK. The CPEN data type in Version 12.5 RTX is a C structure containing a pen color, pen width and pen style setting. In 12.6, CPEN is now a C++ class with a proper constructor and methods for working with CPEN instances. Version 12.5 declarations of CPEN looked like this: