To create a COBOL program-based service interface

1. In Solution Explorer, right-click a project; then click Add > New Item.
2. Expand Installed > COBOL Items > Native.
3. In the center pane, click Service Interface.
4. In the Name field, type a name for your service interface; then click Add.
5. On the Service Interface dialog box, define the service interface using the fields and controls provided. For a description of each, see the Service Interface reference topic.
6. Click OK.