Dim a(10) As Long
Private Sub Command1_Click()
Dim i As Long, b As Long, j As Long
For i = 1 To 10
    For j = 1 To 10 - i
      If a(j) > a(j + 1) Then
      b = a(j)
      a(j) = a(j + 1)
      a(j + 1) = b
      End If
    Next j
Next i
For i = 1 To 10
    Text1.Text = Text1.Text + CStr(a(i)) + "  "
    If i = 5 Then Text1.Text = Text1.Text + Chr(13) + Chr(10)
Next i
End Sub
Private Sub command2_click()
Dim i As Long, l
Text1.Text = ""
For i = 1 To 10
N:    l = InputBox("请输入10个数，这是第" & CStr(i) & "个", "提示", "")
    If IsNumeric(l) Then
    a(i) = l
    Else
       MsgBox "请输入数字", vbOKOnly, "错误"
       GoTo N
    End If
Next i
End Sub

text1的multiline改成true

除了代码将字符换行，文本框控件同时也要设置成多行。

换行可能是你部件没有设计multiline为ture  换行还可加函数 text1.text=text1.text & vbCrLf
另外提醒你要注意一下你用冒泡拍下的用法
 for i = 1 to 10-1
   for j= 1 to 10-i
      If a(j) > a(j + 1) Then
       b = a(j)
       a(j) = a(j + 1)
       a(j + 1) = b
       End If
     Next j
 Next i