如何在Excel中删除非字母数字字符？

Sub RemoveNotAlphasNotNum()
'Updateby2014128
Dim Rng As Range
Dim WorkRng As Range
On Error Resume Next
xTitleId = "KutoolsforExcel"
Set WorkRng = Application.Selection
Set WorkRng = Application.InputBox("Range", xTitleId, WorkRng.Address, Type:=8)
For Each Rng In WorkRng
    xOut = ""
    For i = 1 To Len(Rng.Value)
        xTemp = Mid(Rng.Value, i, 1)
        If xTemp Like "[a-z.]" Or xTemp Like "[A-Z.]" Or xTemp Like "[0-9.]" Then
            xStr = xTemp
        Else
            xStr = ""
        End If
        xOut = xOut & xStr
    Next i
    Rng.Value = xOut
Next
End Sub

Function DeleteNonAlphaNumeric(xStr As String) As String
Dim xStrR As String
Dim xCh As String

Dim xStrMode As String
Dim xInt As Integer
    xStrMode = "[A-Z.a-z 0-9]"
    xStrR = ""
    For xInt = 1 To Len(xStr)
        xCh = Mid(xStr, xInt, 1)
        If xCh Like xStrMode Then
            xStrR = xStrR & xCh
        End If
    Next
    DeleteNonAlphaNumeric = xStrR
End Function