主题：交叉统计汇总行出现小数溢出

自定义菜单就有个交叉统计 数据维护—数据分析。我只要知道用什么办法可以避免小数溢出就行了

If ( e.Form.Controls("RadioButton1").Checked Or e.Form.Controls("RadioButton2").Checked Or e.Form.Controls("RadioButton3").Checked)= False Then
    Messagebox.Show("选一个项目")
    Return
End If
If ( e.Form.Controls("RadioButton4").Checked Or e.Form.Controls("RadioButton5").Checked )= False Then
    Messagebox.Show("选一个面积")
    Return
End If
Dim Filter As String
Dim cmb As WinForm.ComboBox=e.Form.Controls("ComboBox1")
If cmb.Value IsNot Nothing Then
    If Filter > "" Then
        Filter = Filter & " And "
    End If
    Filter = Filter & "乡名= '" & cmb.Value & "'"
End If
Dim g As New CrossTableBuilder("交叉统计", DataTables("总览"),Filter)
If e.Form.Controls("RadioButton1").Checked Then g.VGroups.AddDef("造林年度","{0}年_总面积")
    If e.Form.Controls("RadioButton2").Checked Then g.VGroups.AddDef("造林类别","{0}_总面积")
        If e.Form.Controls("RadioButton3").Checked Then  g.VGroups.AddDef("林种","{0}_总面积")
            If e.Form.Controls("RadioButton4").Checked Then  g.Totals.AddDef("保存面积","总面积")
                If e.Form.Controls("RadioButton5").Checked Then  g.Totals.AddDef("退耕地","总面积")
                    If cmb.Value  IsNot Nothing Then
                        g.HGroups.AddDef("村名")
                    Else
                        g.HGroups.AddDef("乡名")
                    End If
                    g.HorizontalTotal = True
                    g.VerticalTotal = True
                    g.HorizontalProportion = True
                    g.VerticalProportion = True
                    g.Build()
                    MainTable = Tables("交叉统计")
                    Tables("交叉统计").Sort = "合计 DESC"
                    Tables("交叉统计").AutoSizeCols()  '自动列宽
                    Tables("交叉统计").Cols.Frozen = 2  '冻结前二列