x = ConvertToWordArray(sMessage)
 
  a = &H67452301
  b = &HEFCDAB89
  c = &H98BADCFE
  d = &H10325476

  For k = 0 To UBound(x) Step 16
    AA = a
    BB = b
    CC = c
    DD = d
 
    md5_FF a, b, c, d, x(k + 0), S11, &HD76AA478
    md5_FF d, a, b, c, x(k + 1), S12, &HE8C7B756
    md5_FF c, d, a, b, x(k + 2), S13, &H242070DB
    md5_FF b, c, d, a, x(k + 3), S14, &HC1BDCEEE
    md5_FF a, b, c, d, x(k + 4), S11, &HF57C0FAF
    md5_FF d, a, b, c, x(k + 5), S12, &H4787C62A
    md5_FF c, d, a, b, x(k + 6), S13, &HA8304613
    md5_FF b, c, d, a, x(k + 7), S14, &HFD469501
    md5_FF a, b, c, d, x(k + 8), S11, &H698098D8
    md5_FF d, a, b, c, x(k + 9), S12, &H8B44F7AF
    md5_FF c, d, a, b, x(k + 10), S13, &HFFFF5BB1
    md5_FF b, c, d, a, x(k + 11), S14, &H895CD7BE
    md5_FF a, b, c, d, x(k + 12), S11, &H6B901122
    md5_FF d, a, b, c, x(k + 13), S12, &HFD987193
    md5_FF c, d, a, b, x(k + 14), S13, &HA679438E
    md5_FF b, c, d, a, x(k + 15), S14, &H49B40821
 
    md5_GG a, b, c, d, x(k + 1), S21, &HF61E2562
    md5_GG d, a, b, c, x(k + 6), S22, &HC040B340
    md5_GG c, d, a, b, x(k + 11), S23, &H265E5A51
    md5_GG b, c, d, a, x(k + 0), S24, &HE9B6C7AA
    md5_GG a, b, c, d, x(k + 5), S21, &HD62F105D
    md5_GG d, a, b, c, x(k + 10), S22, &H2441453
    md5_GG c, d, a, b, x(k + 15), S23, &HD8A1E681
    md5_GG b, c, d, a, x(k + 4), S24, &HE7D3FBC8
    md5_GG a, b, c, d, x(k + 9), S21, &H21E1CDE6
    md5_GG d, a, b, c, x(k + 14), S22, &HC33707D6
    md5_GG c, d, a, b, x(k + 3), S23, &HF4D50D87
    md5_GG b, c, d, a, x(k + 8), S24, &H455A14ED
    md5_GG a, b, c, d, x(k + 13), S21, &HA9E3E905
    md5_GG d, a, b, c, x(k + 2), S22, &HFCEFA3F8
    md5_GG c, d, a, b, x(k + 7), S23, &H676F02D9
    md5_GG b, c, d, a, x(k + 12), S24, &H8D2A4C8A
     
    md5_HH a, b, c, d, x(k + 5), S31, &HFFFA3942
    md5_HH d, a, b, c, x(k + 8), S32, &H8771F681
    md5_HH c, d, a, b, x(k + 11), S33, &H6D9D6122
    md5_HH b, c, d, a, x(k + 14), S34, &HFDE5380C
    md5_HH a, b, c, d, x(k + 1), S31, &HA4BEEA44