Attach a document

static void attachDoc(RefTableId _refTableId, RefRecId _refRecId, selectableDataArea _refCompanyId, 
                                       FileName    _name)
{
    DocuRef docuRef;
    DocuActionArchive archive;
    ;
    docuRef.clear();
    docuRef.RefRecId = _refRecId;
    docuRef.RefTableId = _refTableId;
    docuRef.RefCompanyId = _refCompanyId;
    docuRef.Name = _name;
    docuRef.TypeId = 'File';
    docuRef.insert();
    archive = new DocuActionArchive();
    archive.add(docuRef, _name);
}