Country region specific condition in AX 2012 / D365

#ISOCountryRegionCodes

if (SysCountryRegionCode::isLegalEntityInCountryRegion([#isoPH]))
{
}

Form Data source field modifed event usage in D365 of AX7

Form Data source field modifed event usage in D365 of AX7

sender.datasource().object(fieldNum(LedgerParameters, Field)).enabled(false);