主题：查询班级上学期班级

Dim cbx1 As WinForm.ComboBox = e.Form.Controls("上学期")
Dim cbx2 As WinForm.ComboBox = e.Form.Controls("下学期")
e.Form.Controls("Table1").Table.Fill("Select '" & cbx1 .Text & "老生已报名" & "' As 学期,b.班级,b.学生编号,学生姓名,缴费日期,性别,年龄,家长姓名,家长电话,关系,户籍地,暂住地,备注 From {学生基本信息} As a  inner join (Select 班级,缴费日期,学生编号 From {缴学费信息} where 学生编号  In (Select 学生编号 from {缴学费信息} where 学期 = '" & cbx1.Text & "') And 学期 = '" & cbx2.Text & "') as b on (a.学生编号 = b.学生编号)", "数据库", True)
Tables("学生报名情况_Table1").AutoSizeCols()

这段代码查询出来的班级是下学期的班级,怎样修改代码使查询出来班级是上学期的班级.请指教  谢谢!

太谢谢了