程序代码如下：

Private Sub Command1_Click()

Dim Sname As String, Skey As String    ‘Sname 保存姓名，Skey保存关键字

Dim i As Integer, j As Integer, n As Integer   ‘n关键字的长度

Skey = Text1.Text

n = Len(Skey)

List2.Clear

For i = 1 To List1.ListCount     ‘ListCount是列表框中项目的个数

    Sname = List1.List(i - 1)     ‘将List1中的第i-1项赋值给Sname

    For j = 1 To     ①   

    If Skey =     ②       Then

        List2.AddItem Sname

        Exit For

    End If

    Next j

Next i

If      ③     = 0 Then List2.AddItem "没有找到带<" & Skey & ">的名字。"

End Sub

  Dim n As Integer，a(100)As Integer，max As Integer

  Private Sub Form_Load()      ‘读取原始数据

    Dim conn As New ADODB．Connection．rs As New ADODB．Recordset

    Dim i As Integer

  conn．ConnectionString=”Provider=Microsoft．ACE．OLEDB．12．0；Data

  Source=”&App．Path&。”＼student．accdb”

    conn．Open

    Set rs．ActiveConnection=conn

    rs．Open“SELECT*FROM DF”

    i=0：max=0

    Do While Not rs．EOF

      i=i+1：n=i

      a(i)=         ‘①

      If a(i)>max Then max=a(i)

      rs．MoveNext

    Loop

    rs．Close：conn．Close

  End Sub

  Private Sub Command1_Click()         ‘去重复值排序

    Const t=max

    Dim i As Integer，b(t)As Integer

    For i=1 To n

      B(a(i))=b(a(i))+1

    Next i

    For i=1 To t

       If  Then List1．AddItem Str(t-i+1)       ‘②

    Next i

  End Sub

Private Sub Command1_Click()

Dim i As Integer, j As Integer, sum As Integer

Dim n As Integer, k As Integer, tmp As String

n = Val (Text1.Text)

sum = 0:List1.Clear

For i = 1 To n-1

 j=i

 Do While sum < n

  {#blank#}1{#/blank#}

 j = j + 1

 Loop

 If sum = n Then

  {#blank#}2{#/blank#}

  For k=i+1 To j-1

   tmp = tmp + “+” + Str(k)

  Next k

  List1.AddItem tmp +“=”+ Str(n)

  End If

  {#blank#}3{#/blank#}

 Next i

 End Sub

 s = "Hello World"

 s1 = ""

 n = Len(s)

 For i = 1 To n \ 2

   If Mid(s, i, 1) > Mid(s, n - i + 1, 1) Then

     s1 = s1 + Mid(s, i, 1)

   Else

     s1 = Mid(s, n - i + 1, 1) + s1

   End If

 Next i

 Text1.Text = s1

执行该程序段后，在文本框Text1中显示的是（  ）