Learn SOLIDWORKS-ADDINS with Real Code Examples
Updated Nov 27, 2025
Architecture
Add-ins are DLLs loaded by SolidWorks at startup
Communicate with SolidWorks via the COM-based API
Can subscribe to document, feature, or application events
May provide UI elements like ribbons, menus, or task panes
Can access local files, databases, or network services
Rendering Model
Add-in loaded as DLL in SolidWorks process
UI components rendered within SolidWorks interface
Event handlers trigger code on document/feature changes
External data accessed via API or database connections
Supports both interactive and automated workflows
Architectural Patterns
DLL-based add-ins
Event-driven programming
Custom UI integration
External system connectivity
Modular and reusable code structure
Real World Architectures
Automotive design automation with batch drawing generation
Aerospace assembly validation and property updates
Industrial machinery with automated BOM creation
Consumer product design with ERP integration
Energy sector CAD automation and reporting
Design Principles
Modular, reusable automation components
Event-driven execution
Seamless integration with SolidWorks UI
Support for enterprise workflows
Extensibility via standard APIs
Scalability Guide
Modularize code for multiple add-ins
Optimize API calls for large assemblies
Distribute add-ins via network or enterprise deployment
Implement global settings for enterprise use
Plan integration with PDM/PLM for large teams
Migration Guide
Legacy macros -> Add-ins: refactor code for DLL deployment
Update API references for new SolidWorks versions
Recreate custom UI elements in task panes or ribbons
Test all automation functionality across parts and assemblies
Document deployment and usage instructions