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Opposite of Hex function?

Posted on 1998-02-01
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Last Modified: 2012-08-14
Hello all!
I am wondering if there is any opposite of the Hex function?
Ex. Hex(255) returns FF.
Then should ThatFunction(FF) return 255!
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Question by:martinag
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Accepted Solution

by:
mrmick earned 100 total points
ID: 1454797
Function HexStringToDecimal(Hex As String) As Long

   Dim strIn$, i&, j&, k&, c$
   strIn = Trim$(Hex)
   If Len(strIn) > 8 Then
      'Overflow
      Exit Function
   End If
   For i = Len(strIn) To 1 Step -1
      c = UCase(Mid$(Hex, i, 1))
      Select Case c
         Case "0" To "9"
            k = k + CLng(c) * 16 ^ j
         Case "A" To "F"
            k = k + (Asc(c) - 55) * 16 ^ j
         Case Else
            'Invalid character Error
            Exit Function
      End Select
      j = j + 1
   Next
   HexStringToDecimal = k

End Function

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