#region->最值
            IDataSrc iActiveTrace = m_DataManager.PoolEntries[poolentry].DataSource;
            WavMinMax calculator = new WavMinMax(iActiveTrace, double.MinValue, double.MaxValue);
            WavCalcResult Calcresult = calculator.Exec();
            if (Calcresult != WavCalcResult.OK)
            {
                MessageBox.Show(this, "Can not calculate Max/Min\r\n\r\n" + calculator.ErrorCode, "CSI Display Demo");
                return;
            }
            double dMin;
            double dMax;
            double dMinPos;
            double dMaxPos;
            calculator.Result(out dMin, out dMax, out dMinPos, out dMaxPos);
            lblMin.Text = Conversion.ConvertDoubleToString(dMin, 4, iActiveTrace.YUnit) + iActiveTrace.YUnit;
            lblMax.Text = Conversion.ConvertDoubleToString(dMax, 4, iActiveTrace.YUnit) + iActiveTrace.YUnit;
            lblMinPos.Text = Conversion.ConvertDoubleToString(dMinPos, 4, iActiveTrace.XUnit) + iActiveTrace.XUnit;
            lblMaxPos.Text = Conversion.ConvertDoubleToString(dMaxPos, 4, iActiveTrace.XUnit) + iActiveTrace.XUnit;
            display1.TimeDisplay.Cursors[1].time = dMinPos;
            display1.TimeDisplay.Cursors[2].time = dMaxPos;
            display1.TimeDisplay.CtlLayout.HorizontalCursors.Visible = true;
            #endregion

我只想显示dMax-dMin的值，语句该怎么写呢？
lblFudu.Text = ？

=(dMax-dMin).ToString()