Returns the event parameter value as PRL_INT64.
PRL_RESULT PrlEvtPrm_ToInt64( PRL_HANDLE hEventParam, PRL_INT64_PTR pnParamValue );
PrlApiCore.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.