ISC_SERVICE_HANDLE
After the driver handle has been created, the driver handle method RequestService is invoked, to request the driver handle to provide a service. Driver parameters (parameters prefaced with Service: or parameters without a prefacing keyword) are passed, which were specified in the Communications Drivers and Profiles view.
In response to this request, the driver handle returns the service handle (ISC_SERVICE_HANDLE), one instance for each agent. Calling methods of the service handle makes the feature set of the communications system available.
The driver handle and service handle together make up the implementation of the communications driver, along with other program data and logic.
Your implementation of the service handle invokes methods of the client handle, ISC_CLIENT_HANDLE. The client handle is implemented by Oracle.
For more information about the RequestService method, see RequestService.