You can use User Defined Features (UDFs) to create features from Macro add-ins, or to insert features from the Part Library.
Macro add-ins features are created using FeatureCAM's application programming interface (API). These features are loaded into FeatureCAM using the Macro Add-ins dialog; this allows FeatureCAM's standard interface to remain as streamlined as possible.
Examples of add-in features include: helical bores with cutter compensation, thin-walled pockets and bosses, and pulley grooves.