callbackservice with task

hello

I see a specification for a service callbackdata.

I read when a task complete you can call a callbackdata service.

How i can do this?

I know how build a service with specification, but how i register the service for one task.

please expain in more detail what exactly you are trying to achieve

I want, when a task finish (with task Engine) lunch a service automatically with callbackdata service.

I can’t explain better !

you can do it on task completion event or in the step next to the task step…

yes i say.

But you have a definition for service callback data.
I think when you read the pdf of task engine, you can build a service, who is call automatically for all task for exemple.