具体方法是:
Sub z()
Dim s As String, i As Long
s = "aa往ddd往aa"
i = 1
Do While i < Len(s) - 1
If (Asc(Mid(s, i, 1)) And 128) <> (Asc(Mid(s, i + 1, 1)) And 128) Then
s = Left(s, i) & "^" & Right(s, Len(s) - i)
i = i + 1 '1为插入字符"^"的长度,注意要一致,否则进入死循环
End If
i = i + 1
Loop
MsgBox s
End Sub