dde_current_connection/2

Documentation
- Reference manual
  - Built-in Predicates
    - Windows DDE interface
      - DDE server mode
        
        dde_register_service/2
        
        dde_unregister_service/1
        
        dde_current_service/2
        
        dde_current_connection/2
- Packages

dde_current_connection(-Service, -Topic)

Find currently open conversations.