With in Version Difference (DifferenceTypeUpdateNoChange) how to pass IQueryFilter in ArcObjects

I want to know only real shape edits between 2 versions. How can I pass iQueryfilter to DifferenceTypeUpdateNoChange?

public void DifferenceTypeUpdateNoChange(ITable sourceTable, ITable differenceTable, esriDifferenceType differenceType, iQueryfilter Qf)
        {
            IQueryFilter qf = new QueryFilterClass();
            qf.SubFields = "SHAPE.AREA,SHAPE.LEN";
            qf.WhereClause = "SHAPE.AREA,SHAPE.LEN";    
            try
            {
                IVersionedTable versionedTable = (IVersionedTable)sourceTable;
                IDifferenceCursor differenceCursor = versionedTable.Differences(differenceTable, differenceType, Qf);
                IRow differenceRow;
                int objectID;
                differenceCursor.Next(out objectID, out differenceRow);
                //Detect and output all the differences between the two versions
                int count = 0;
                while (objectID != -1)
                {                    
                    Console.WriteLine(FClassName + "," + objectID + "," + " has been modified");
                    //WriteCSV(FClassName, objectID, "Updated Feature");
                    differenceCursor.Next(out objectID, out differenceRow);                   
                    count++;
                }                
                //sw.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }