Call this API if you want to launch your app in background when a push arrives.
#include <bbpush/push_service.h>
int push_service_register_to_launch(push_service_t *ps, push_callback_t cb_func)
BlackBerry 10.2.0
A pointer to the push_service_t structure used to create the request.
Callback in response to push_service_register_to_launch(). This callback contains a status_code parameter to specify the failure condition. This callback function cannot be NULL.
PUSH_SUCCESS upon success, PUSH_FAILURE with errno set otherwise.