URL Encode 與 Decode 的 Function

Public Function urlDecode(s As String) As String
If Len(s) = 0 Then Exit Function
Dim i As Integer
Dim tmp As String
Dim c As String
For i = 1 To Len(s)
c = Mid$(s, i, 1)
If c = "+" Then c = " "
If c = "%" Then
c = Chr$("&H" + Mid$(s, i + 1, 2))
i = i + 2
End If
tmp = tmp + c
Next i
urlDecode = tmp
End Function

Public Function urlEncode(s As String) As String
If Len(s) = 0 Then Exit Function

Dim tmp As String
Dim c As String
Dim i As Integer

For i = 1 To Len(s)
c = Mid(s, i, 1)
If (Asc(c) >= 65 And Asc(c) <= 90) _
Or (Asc(c) >= 97 And Asc(c) <= 122) _
Or (Asc(c) >= 48 And Asc(c) <= 58) _
Or Asc(c) = 38 _
Or (Asc(c) >= 45 And Asc(c) <= 47) _
Or Asc(c) = 58 Or Asc(c) = 61 _
Or Asc(c) = 63 Or Asc(c) = 126 Then
tmp = tmp + c
Else
tmp = tmp + "%" + Hex(Asc(c))
End If
Next i
urlEncode = tmp
End Function