
试一下
Private Sub Command1_Click()
Dim s As String, n As Long
s = InputBox("输入字符串:", , "ABCDEFG")
Print s
n = Len(s)
While n > 0
Print Mid(s, n, 1);
n = n - 1
Wend
End Sub

试一下
Private Sub Command1_Click()
Dim s As String, n As Long
s = InputBox("输入字符串:", , "ABCDEFG")
Print s
n = Len(s)
While n > 0
Print Mid(s, n, 1);
n = n - 1
Wend
End Sub