Public Class Form1
Private Function getCrc16(b() As Byte, nLen As Integer) As UInt16

             {&H0, &H1189, &H2312, &H329B, &H4624, &H57AD, &H6536, &H74BF, _
              &H8C48, &H9DC1, &HAF5A, &HBED3, &HCA6C, &HDBE5, &HE97E, &HF8F7, _
              &H1081, &H108, &H3393, &H221A, &H56A5, &H472C, &H75B7, &H643E, _
              &H9CC9, &H8D40, &HBFDB, &HAE52, &HDAED, &HCB64, &HF9FF, &HE876, _
              &H2102, &H308B, &H210, &H1399, &H6726, &H76AF, &H4434, &H55BD, _
              &HAD4A, &HBCC3, &H8E58, &H9FD1, &HEB6E, &HFAE7, &HC87C, &HD9F5, _
              &H3183, &H200A, &H1291, &H318, &H77A7, &H662E, &H54B5, &H453C, _
              &HBDCB, &HAC42, &H9ED9, &H8F50, &HFBEF, &HEA66, &HD8FD, &HC974, _
              &H4204, &H538D, &H6116, &H709F, &H420, &H15A9, &H2732, &H36BB, _
              &HCE4C, &HDFC5, &HED5E, &HFCD7, &H8868, &H99E1, &HAB7A, &HBAF3, _
              &H5285, &H430C, &H7197, &H601E, &H14A1, &H528, &H37B3, &H263A, _
              &HDECD, &HCF44, &HFDDF, &HEC56, &H98E9, &H8960, &HBBFB, &HAA72, _
              &H6306, &H728F, &H4014, &H519D, &H2522, &H34AB, &H630, &H17B9, _
              &HEF4E, &HFEC7, &HCC5C, &HDDD5, &HA96A, &HB8E3, &H8A78, &H9BF1, _
              &H7387, &H620E, &H5095, &H411C, &H35A3, &H242A, &H16B1, &H738, _
              &HFFCF, &HEE46, &HDCDD, &HCD54, &HB9EB, &HA862, &H9AF9, &H8B70, _
              &H8408, &H9581, &HA71A, &HB693, &HC22C, &HD3A5, &HE13E, &HF0B7, _
              &H840, &H19C9, &H2B52, &H3ADB, &H4E64, &H5FED, &H6D76, &H7CFF, _
              &H9489, &H8500, &HB79B, &HA612, &HD2AD, &HC324, &HF1BF, &HE036, _
              &H18C1, &H948, &H3BD3, &H2A5A, &H5EE5, &H4F6C, &H7DF7, &H6C7E, _
              &HA50A, &HB483, &H8618, &H9791, &HE32E, &HF2A7, &HC03C, &HD1B5, _
              &H2942, &H38CB, &HA50, &H1BD9, &H6F66, &H7EEF, &H4C74, &H5DFD, _
              &HB58B, &HA402, &H9699, &H8710, &HF3AF, &HE226, &HD0BD, &HC134, _
              &H39C3, &H284A, &H1AD1, &HB58, &H7FE7, &H6E6E, &H5CF5, &H4D7C, _
              &HC60C, &HD785, &HE51E, &HF497, &H8028, &H91A1, &HA33A, &HB2B3, _
              &H4A44, &H5BCD, &H6956, &H78DF, &HC60, &H1DE9, &H2F72, &H3EFB, _
              &HD68D, &HC704, &HF59F, &HE416, &H90A9, &H8120, &HB3BB, &HA232, _
              &H5AC5, &H4B4C, &H79D7, &H685E, &H1CE1, &HD68, &H3FF3, &H2E7A, _
              &HE70E, &HF687, &HC41C, &HD595, &HA12A, &HB0A3, &H8238, &H93B1, _
              &H6B46, &H7ACF, &H4854, &H59DD, &H2D62, &H3CEB, &HE70, &H1FF9, _
              &HF78F, &HE606, &HD49D, &HC514, &HB1AB, &HA022, &H92B9, &H8330, _
              &H7BC7, &H6A4E, &H58D5, &H495C, &H3DE3, &H2C6A, &H1EF1, &HF78}

        Dim fcs As UInt16 = &HFFFF
        For i = 0 To nLen - 1
            fcs = (fcs >> 8) Xor crctab16((fcs Xor b(i)) And &HFF)
        Next
        Return Not fcs

    End Function

 Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        Dim s As String = "0D0103588990532174470001"
        Dim inp(s.Length \ 2 - 1) As Byte 'allocate byte array storage assumes string length is even, 2 chars per hex byte
        For i = 0 To inp.Length - 1  'for each byte in the array
            inp(i) = Convert.ToByte(s.Substring(i * 2, 2), 16) 'convert 2 hex chars from the string into a byte value
        Next
        TextBox1.Text = (getCrc16(inp, inp.Length).ToString("X"))
 End Sub
End Class  

This is VS2010(vb.net) code i want to convert it in visual basic 6.0.
is there any one who can solve this issue???

This is close to impossible since that code won't compile as is and it references objects that are created elsewhere.

thnx to reply tinstaafl... its is basically crc 16 error sum check value program. sorry there was mistake in copy paste again i send you the code again..please go through it if u can....its important to me.. if any1 can help

` Private Function getCrc16(b() As Byte, nLen As Integer) As UInt16

Static crctab16() As UInt16 = _
      {&H0, &H1189, &H2312, &H329B, &H4624, &H57AD, &H6536, &H74BF, _
      &H8C48, &H9DC1, &HAF5A, &HBED3, &HCA6C, &HDBE5, &HE97E, &HF8F7, _
      &H1081, &H108, &H3393, &H221A, &H56A5, &H472C, &H75B7, &H643E, _
      &H9CC9, &H8D40, &HBFDB, &HAE52, &HDAED, &HCB64, &HF9FF, &HE876, _
      &H2102, &H308B, &H210, &H1399, &H6726, &H76AF, &H4434, &H55BD, _
      &HAD4A, &HBCC3, &H8E58, &H9FD1, &HEB6E, &HFAE7, &HC87C, &HD9F5, _
      &H3183, &H200A, &H1291, &H318, &H77A7, &H662E, &H54B5, &H453C, _
      &HBDCB, &HAC42, &H9ED9, &H8F50, &HFBEF, &HEA66, &HD8FD, &HC974, _
      &H4204, &H538D, &H6116, &H709F, &H420, &H15A9, &H2732, &H36BB, _
      &HCE4C, &HDFC5, &HED5E, &HFCD7, &H8868, &H99E1, &HAB7A, &HBAF3, _
      &H5285, &H430C, &H7197, &H601E, &H14A1, &H528, &H37B3, &H263A, _
      &HDECD, &HCF44, &HFDDF, &HEC56, &H98E9, &H8960, &HBBFB, &HAA72, _
      &H6306, &H728F, &H4014, &H519D, &H2522, &H34AB, &H630, &H17B9, _
      &HEF4E, &HFEC7, &HCC5C, &HDDD5, &HA96A, &HB8E3, &H8A78, &H9BF1, _
      &H7387, &H620E, &H5095, &H411C, &H35A3, &H242A, &H16B1, &H738, _
      &HFFCF, &HEE46, &HDCDD, &HCD54, &HB9EB, &HA862, &H9AF9, &H8B70, _
      &H8408, &H9581, &HA71A, &HB693, &HC22C, &HD3A5, &HE13E, &HF0B7, _
      &H840, &H19C9, &H2B52, &H3ADB, &H4E64, &H5FED, &H6D76, &H7CFF, _
      &H9489, &H8500, &HB79B, &HA612, &HD2AD, &HC324, &HF1BF, &HE036, _
      &H18C1, &H948, &H3BD3, &H2A5A, &H5EE5, &H4F6C, &H7DF7, &H6C7E, _
      &HA50A, &HB483, &H8618, &H9791, &HE32E, &HF2A7, &HC03C, &HD1B5, _
      &H2942, &H38CB, &HA50, &H1BD9, &H6F66, &H7EEF, &H4C74, &H5DFD, _
      &HB58B, &HA402, &H9699, &H8710, &HF3AF, &HE226, &HD0BD, &HC134, _
      &H39C3, &H284A, &H1AD1, &HB58, &H7FE7, &H6E6E, &H5CF5, &H4D7C, _
      &HC60C, &HD785, &HE51E, &HF497, &H8028, &H91A1, &HA33A, &HB2B3, _
      &H4A44, &H5BCD, &H6956, &H78DF, &HC60, &H1DE9, &H2F72, &H3EFB, _
      &HD68D, &HC704, &HF59F, &HE416, &H90A9, &H8120, &HB3BB, &HA232, _
      &H5AC5, &H4B4C, &H79D7, &H685E, &H1CE1, &HD68, &H3FF3, &H2E7A, _
      &HE70E, &HF687, &HC41C, &HD595, &HA12A, &HB0A3, &H8238, &H93B1, _
      &H6B46, &H7ACF, &H4854, &H59DD, &H2D62, &H3CEB, &HE70, &H1FF9, _
      &HF78F, &HE606, &HD49D, &HC514, &HB1AB, &HA022, &H92B9, &H8330, _
      &H7BC7, &H6A4E, &H58D5, &H495C, &H3DE3, &H2C6A, &H1EF1, &HF78}

        Dim fcs As UInt16 = &HFFFF
        For i = 0 To nLen - 1
            fcs = (fcs >> 8) Xor crctab16((fcs Xor b(i)) And &HFF)
        Next
        Return Not fcs

End Function
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
for the first case, D4CF for the second case

   Private Function getCrc16(b() As Byte, nLen As Integer) As UInt16

    Static crctab16() As UInt16 = _
          {&H0, &H1189, &H2312, &H329B, &H4624, &H57AD, &H6536, &H74BF, _
          &H8C48, &H9DC1, &HAF5A, &HBED3, &HCA6C, &HDBE5, &HE97E, &HF8F7, _
          &H1081, &H108, &H3393, &H221A, &H56A5, &H472C, &H75B7, &H643E, _
          &H9CC9, &H8D40, &HBFDB, &HAE52, &HDAED, &HCB64, &HF9FF, &HE876, _
          &H2102, &H308B, &H210, &H1399, &H6726, &H76AF, &H4434, &H55BD, _
          &HAD4A, &HBCC3, &H8E58, &H9FD1, &HEB6E, &HFAE7, &HC87C, &HD9F5, _
          &H3183, &H200A, &H1291, &H318, &H77A7, &H662E, &H54B5, &H453C, _
          &HBDCB, &HAC42, &H9ED9, &H8F50, &HFBEF, &HEA66, &HD8FD, &HC974, _
          &H4204, &H538D, &H6116, &H709F, &H420, &H15A9, &H2732, &H36BB, _
          &HCE4C, &HDFC5, &HED5E, &HFCD7, &H8868, &H99E1, &HAB7A, &HBAF3, _
          &H5285, &H430C, &H7197, &H601E, &H14A1, &H528, &H37B3, &H263A, _
          &HDECD, &HCF44, &HFDDF, &HEC56, &H98E9, &H8960, &HBBFB, &HAA72, _
          &H6306, &H728F, &H4014, &H519D, &H2522, &H34AB, &H630, &H17B9, _
          &HEF4E, &HFEC7, &HCC5C, &HDDD5, &HA96A, &HB8E3, &H8A78, &H9BF1, _
          &H7387, &H620E, &H5095, &H411C, &H35A3, &H242A, &H16B1, &H738, _
          &HFFCF, &HEE46, &HDCDD, &HCD54, &HB9EB, &HA862, &H9AF9, &H8B70, _
          &H8408, &H9581, &HA71A, &HB693, &HC22C, &HD3A5, &HE13E, &HF0B7, _
          &H840, &H19C9, &H2B52, &H3ADB, &H4E64, &H5FED, &H6D76, &H7CFF, _
          &H9489, &H8500, &HB79B, &HA612, &HD2AD, &HC324, &HF1BF, &HE036, _
          &H18C1, &H948, &H3BD3, &H2A5A, &H5EE5, &H4F6C, &H7DF7, &H6C7E, _
          &HA50A, &HB483, &H8618, &H9791, &HE32E, &HF2A7, &HC03C, &HD1B5, _
          &H2942, &H38CB, &HA50, &H1BD9, &H6F66, &H7EEF, &H4C74, &H5DFD, _
          &HB58B, &HA402, &H9699, &H8710, &HF3AF, &HE226, &HD0BD, &HC134, _
          &H39C3, &H284A, &H1AD1, &HB58, &H7FE7, &H6E6E, &H5CF5, &H4D7C, _
          &HC60C, &HD785, &HE51E, &HF497, &H8028, &H91A1, &HA33A, &HB2B3, _
          &H4A44, &H5BCD, &H6956, &H78DF, &HC60, &H1DE9, &H2F72, &H3EFB, _
          &HD68D, &HC704, &HF59F, &HE416, &H90A9, &H8120, &HB3BB, &HA232, _
          &H5AC5, &H4B4C, &H79D7, &H685E, &H1CE1, &HD68, &H3FF3, &H2E7A, _
          &HE70E, &HF687, &HC41C, &HD595, &HA12A, &HB0A3, &H8238, &H93B1, _
          &H6B46, &H7ACF, &H4854, &H59DD, &H2D62, &H3CEB, &HE70, &H1FF9, _
          &HF78F, &HE606, &HD49D, &HC514, &HB1AB, &HA022, &H92B9, &H8330, _
          &H7BC7, &H6A4E, &H58D5, &H495C, &H3DE3, &H2C6A, &H1EF1, &HF78}

            Dim fcs As UInt16 = &HFFFF
            For i = 0 To nLen - 1
                fcs = (fcs >> 8) Xor crctab16((fcs Xor b(i)) And &HFF)
            Next
            Return Not fcs

End Function
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
for the first case, D4CF for the second case 
        Dim s As String = "0D010358899053217447000A"
        Dim inp(s.Length \ 2 - 1) As Byte 
            For i = 0 To inp.Length - 1  
                inp(i) = Convert.ToByte(s.Substring(i * 2, 2), 16) 
            Next
            TextBox1.Text = (getCrc16(inp, inp.Length).ToString("X"))
        End Sub

End Class


    Dim inp(s.Length \ 2 - 1) As Byte 
        For i = 0 To inp.Length - 1  
            inp(i) = Convert.ToByte(s.Substring(i * 2, 2), 16) 
        Next
        TextBox1.Text = (getCrc16(inp, inp.Length).ToString("X"))
    End Sub

End Class`

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