主题：变量设置问题

Dim Filter As String
Dim i As String = e.Form.Controls("ComboBox1").value   

Dim n As String = e.Form.Controls("ComboBox3").value   
With e.Form.Controls("combobox5")
       If .Value IsNot Nothing Then
             If Filter > "" Then
            Filter = Filter & " And "
        End If
        Filter = Filter & "  列名称  = '"& .Value &"' " 
    End If
End With
If Filter > "" Then
    Tables(i).Filter = Filter
End If
Tables(i).Filter  = Filter
MainTable = Tables(i) '打开生成的统计表

上面代码中的这句:     Filter = Filter & "  列名称  = '"& .Value &"' "   中的"列名称
"用变量 n  一个如何设置,请师傅指导,谢谢!