ReleaseISCServiceInstance
Releases the service handle that was created using RequestService, and free resources. No subsequent calls to the driver handle are made. The driver must in turn make no further calls to the client handle.
Note: ReleaseISCServiceInstance is the last communication between
the Communications Session Manager and the communications driver.
After calling this function, Communications Session Manager no longer
calls the driver, and the driver must no longer call back to the Siebel
application, because the communications client and the client handle
no longer exist.
ISCAPI ISC_RESULT ReleaseISCServiceInstance
/* in */(ISC_SERVICE_HANDLE handle);