Функция md5

Function GetHash(ByVal txt$) As String
    Dim oUTF8, oMD5, abyt, i&, k&, hi&, lo&, chHi$, chLo$
    Set oUTF8 = CreateObject("System.Text.UTF8Encoding")
    Set oMD5 = CreateObject("System.Security.Cryptography.MD5CryptoServiceProvider")
    abyt = oMD5.ComputeHash_2(oUTF8.GetBytes_4(txt$))
    For i = 1 To LenB(abyt)
        k = AscB(MidB(abyt, i, 1))
        lo = k Mod 16: hi = (k - lo) / 16
        If hi > 9 Then chHi = Chr(Asc("a") + hi - 10) Else chHi = Chr(Asc("0") + hi)
        If lo > 9 Then chLo = Chr(Asc("a") + lo - 10) Else chLo = Chr(Asc("0") + lo)
        GetHash = GetHash & chHi & chLo
    Next
    Set oUTF8 = Nothing: Set oMD5 = Nothing
End Function