The application uses a business service to pass the input parameters (the value of the Customer Name field) to the start event of the business process.
Procedure
Right-click the start event and select Trigger Type > Message Trigger.
This generates a validation error that you can see by moving the pointer over the error flag on the start event.
Click Clean and build project: CustomerServices in the error box, and note that after a short delay, the error is no longer displayed.
Right-click the start event and select Business Service > Generate.
A business service with a user task and a send task is generated:
Rename the user task in the business service Collect Customer Name. Similarly, rename the send task Start Process.
In the Project Explorer, rename the business service from CustomerServices-Catch Message Event to Provide Name.