allow edit only few fields in a form grid

Make only few fields  editable/ uneditable on form grid

DictTable dictTable = new DictTable(TableName.TableId);
    int i;
    int fieldNumber;
;
    if (CONDITION)
    {      
        for(i = 1;i <= dictTable.fieldCnt();i++)
        {
            fieldNumber = dictTable.fieldCnt2Id(i);
            if(Table_DS.object(fieldNumber) && fieldNumber !=    fieldNum(Table, Field) )
            {
                Table_DS.object(fieldNumber).allowEdit(false);
            }          
        }
       
    }