下面的函数利用递归原理获得字符串的翻转字符串
Function reversestring(revstr As String) As String
＇ revstr: 要翻转的字符串
＇ 返回值:翻转后的字符串
Dim doreverse As Long
reversestring = ""
For doreverse = Len(revstr) To 1 Step -1
reversestring = reversestring & Mid$(revstr, doreverse, 1)
Next
End Function