The first step to understanding FeatureCAM's programming ability is to successfully use the programming examples that ship with FeatureCAM. Make sure that you install the latest version of FeatureCAM. You'll get a folder called "addins" in your <C:\Program Files\FeatureCAM> folder.
Choose the Add-Ins menu item in the Options menu. This brings up the Add-ins dialog that lists the add-ins available to you.
As an example let's load MakeStockGeometry.bas and run it:
Click the checkbox next to MakeStockGeometry.bas in order to load it into FeatureCAM.
Press OK on this dialog in order to dismiss it.
Then look around your screen for a new floating toolbar that looks like:
. This
button as created when the add-in was loaded.
Press the new button to create lines that matches the outline of your stock.
You are done. You've loaded and used an add-in.
Not all add-ins create buttons. See Creating Toolbar Buttons for Macros for information on creating buttons.