...
The TurboCAD Software Development Kit enables you to program your own routines within TurboCAD.
If you install TurboCAD using the Full installation, an SDK folder is created. This folder contains SDK samples and documentation (online help).
Several SDK tools are provided in TurboCAD, located in the AddOns menu. These are located in the sections to which they are relevant. Each tool can be found in the index.