to Adding document handling notes write following code in a job
DocuRef docuRef;
#define.vend('V123')
#define.docuType('Note')
;
docuRef.RefCompanyId = curext();
docuRef.RefTableId = tablenum(VendTable);
docuRef.RefRecId = VendTable::find(#vend).RecId;
docuRef.TypeId = #docuType;
docuRef.Name = 'ImportedT';
docuRef.Notes = 'This vendor imported.';
docuRef.insert();