To install the AndyMark WPILib dependencies, click the WPILib tab on the right side of VSCode window. Then, find the AndyMark AM Library and click install. This will install all of the libraries needed for AndyMark CAN devices
Alternative: To install using vendor JSON
Click the "Open WPILib Command Palette" button in VS Code
In the text box, begin typing "Manage Vendor Libraries" and click on the command
Click on "Install new libraries (online)"
Paste the link to the most recent vendor JSON for the WPILib year. Links to the AndyMark vendor JSONs can be found here
Hit enter, and WPILib will fetch the appropriate files for you to start writing code for AndyMark CAN devices