Returns the event parameter value as PRL_UINT64 .
PRL_RESULT PrlEvtPrm_ToUint64( PRL_HANDLE hEventParam, PRL_UINT64_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.