Integrating with Other Products > API Guide > Introduction > Automation Interface
  
Automation Interface
The automation interface provides a mechanism for communicating with Mathcad from another Windows application, including custom standalone applications. Using Automation commands, you can:
Send data or assign variable values to Mathcad from another application
Open, execute, or close Mathcad worksheets
Send results back to the original application
To use Automation technology, write a program in an application that can serve as an Automation client, such as Microsoft Excel. The program you write defines and retrieves variables in PTC Mathcad Prime worksheets. The variables defined in and retrieved from PTC Mathcad Prime can be complex scalars, strings, or matrices.