by Pierre-Alain Vigeant (1 Submission)
Category: Miscellaneous
Compatability: Visual Basic 3.0
Difficulty: Unknown Difficulty
Date Added: Wed 3rd February 2021
Rating: 
(7 Votes)
This module contain function that are used to convert between decimal, binary and hexadecimal.
Inputs
Depend on the function
Assumes
Each function are 'stand-alone'. This mean that u can copy one of them without needing another one.
The conversion function are written in this way:
Code Returns
Depend on the function
'**************************************************************
'* Best Tools *
'* Conversion *
'* v2.1 (Improved performance) *
'* for VB *
'* *
'*This module contain a lot of subs and functions for basic *
'*conversion between Hexadecimal, Binary and decimal. *
'**************************************************************
Option Explicit
Public Function Bin2Dec(ByVal sBin As String) As Long
Dim i As Integer
For i = 1 To Len(sBin)
Bin2Dec = Bin2Dec + CLng(CInt(Mid(sBin, Len(sBin) - i + 1, 1)) * 2 ^ (i - 1))
Next i
End Function
Public Function Bin2Hex(ByVal sBin As String) As String
Dim i As Integer
Dim nDec As Long
sBin = String(4 - Len(sBin) Mod 4, "0") & sBin 'Add zero to complete Byte
For i = 1 To Len(sBin)
nDec = nDec + CInt(Mid(sBin, Len(sBin) - i + 1, 1)) * 2 ^ (i - 1)
Next i
Bin2Hex = Hex(nDec)
If Len(Bin2Hex) Mod 2 = 1 Then Bin2Hex = "0" & Bin2Hex
End Function
Public Function Dec2Bin(ByVal nDec As Integer) As String
'This function is the same then Hex2Bin, but it has been copied to speed up process
Dim i As Integer
Dim j As Integer
Dim sHex As String
Const HexChar As String = "0123456789ABCDEF"
sHex = Hex(nDec) 'That the only part that is different
For i = 1 To Len(sHex)
nDec = InStr(1, HexChar, Mid(sHex, i, 1)) - 1
For j = 3 To 0 Step -1
Dec2Bin = Dec2Bin & nDec \ 2 ^ j
nDec = nDec Mod 2 ^ j
Next j
Next i
'Remove the first unused 0
i = InStr(1, Dec2Bin, "1")
If i <> 0 Then Dec2Bin = Mid(Dec2Bin, i)
End Function
Public Function Hex2Bin(ByVal sHex As String) As String
Dim i As Integer
Dim j As Integer
Dim nDec As Long
Const HexChar As String = "0123456789ABCDEF"
For i = 1 To Len(sHex)
nDec = InStr(1, HexChar, Mid(sHex, i, 1)) - 1
For j = 3 To 0 Step -1
Hex2Bin = Hex2Bin & nDec \ 2 ^ j
nDec = nDec Mod 2 ^ j
Next j
Next i
'Remove the first unused 0
i = InStr(1, Hex2Bin, "1")
If i <> 0 Then Hex2Bin = Mid(Hex2Bin, i)
End Function
Public Function Hex2Dec(ByVal sHex As String) As Long
Dim i As Integer
Dim nDec As Long
Const HexChar As String = "0123456789ABCDEF"
For i = Len(sHex) To 1 Step -1
nDec = nDec + (InStr(1, HexChar, Mid(sHex, i, 1)) - 1) * 16 ^ (Len(sHex) - i)
Next i
Hex2Dec = CStr(nDec)
End Function
Public Function HiWord(ByVal DWord As Long) As Long
HiWord = (DWord \ 65536) And &HFFFF
End Function
Public Function LoWord(ByVal DWord As Long) As Long
LoWord = DWord And &HFFFF
End Function
Public Function DWord(ByVal HiWord As Long, ByVal LoWord As Long) As Long
DWord = ((LoWord And 65536) Or ((HiWord And 65536) * 65536))
End Function
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