Hello All,
Since the Code93 barcode generator has been developed I've been thinking of Code128. And finally I've developed it! As before want to share it with other Mr.Excel users and Google searchers.
It was much easier and faster than Code93 as Code128 is simpler to encode and yet more powerful particularly for strings of digits.
Main features:
- Main symbology has been picked from CODE128 SYMBOLOGY;
- The sub uses Shapes collection to draw lines of a barcode instead of special fonts;
- Sub draws a barcode onto a target Worksheet from beginning position which is defined by horizontal offset (X), vertical offset (Y) measured in mm of required height in mm; bar width is defined in pt;
- Code uses "B" and "C" charsets only;
- A "tweak" for numeric strings has been implemented: If a numeric string to be encoded is of odd length the first symbol is encoded as "B"; the rest of symbols are encoded as "C". This tweak significantly reduces barcode length for a numeric string.
- 10% bars overlapping is used for drawing as this value showed the best result at scanning tests.
Weaknesses/incompletenesses:
- Code does not generate any special "instruction" symbols: symbols 95-98, 100, 102 in charset "B" and 102 in charset "C".
- Code does not check the length of the encoded string;
- A complete barcode width is not pre-calulated and drawing begins from left which can cause unexpected overhangs;
- Sub does not support a barcode inclination; just vertical orientation
- A barcode position is only correct when 100% print size is set.
- Obviously version-depended code (different versions/OSs/printers can vary the result, NOT tested).
Win 7 Ultimate, MS Office 2007 were used to develop and tests.
So, the main code is:
Barcode reading has been tested by an Android phone (Accusoft Barcode Scanner program) as well as by a PROTON IMS-3100 and a cheap Chineese (PAN.CODE A500) hardware scanners.
Hope it would be of any help to anybody.
Would be helpful for me if you comment this thread when using it in your apps.
Regards,
Yakovleff
Since the Code93 barcode generator has been developed I've been thinking of Code128. And finally I've developed it! As before want to share it with other Mr.Excel users and Google searchers.
It was much easier and faster than Code93 as Code128 is simpler to encode and yet more powerful particularly for strings of digits.
Main features:
- Main symbology has been picked from CODE128 SYMBOLOGY;
- The sub uses Shapes collection to draw lines of a barcode instead of special fonts;
- Sub draws a barcode onto a target Worksheet from beginning position which is defined by horizontal offset (X), vertical offset (Y) measured in mm of required height in mm; bar width is defined in pt;
- Code uses "B" and "C" charsets only;
- A "tweak" for numeric strings has been implemented: If a numeric string to be encoded is of odd length the first symbol is encoded as "B"; the rest of symbols are encoded as "C". This tweak significantly reduces barcode length for a numeric string.
- 10% bars overlapping is used for drawing as this value showed the best result at scanning tests.
Weaknesses/incompletenesses:
- Code does not generate any special "instruction" symbols: symbols 95-98, 100, 102 in charset "B" and 102 in charset "C".
- Code does not check the length of the encoded string;
- A complete barcode width is not pre-calulated and drawing begins from left which can cause unexpected overhangs;
- Sub does not support a barcode inclination; just vertical orientation
- A barcode position is only correct when 100% print size is set.
- Obviously version-depended code (different versions/OSs/printers can vary the result, NOT tested).
Win 7 Ultimate, MS Office 2007 were used to develop and tests.
So, the main code is:
Code:
<code>
Sub Code128Generate(ByVal X As Single, ByVal Y As Single, ByVal Height As Single, ByVal LineWeight As Single, _
ByRef TargetSheet As Worksheet, ByVal Content As String)
' Supports B and C charsets only; values 00-94, 99,101, 103-105 for B, 00-101, 103-105 for C
' X, Y - top-left corner coordinates
' X in mm (0.376042)
' Y in mm (0.341)
' Height in mm
' LineWeight in pt
Const Tbar_Symbol As String * 2 = "11" ' termination bar
Dim WeightSum As Single
Dim CurBar As Integer
Dim i, j, k, FirstSymbol As Integer
Dim tstr2 As String * 2
Dim tstr1 As String * 1
Dim ContentString As String ' bars sequence
Dim SymbolValue(0 To 106) As Integer ' values
Dim SymbolString(0 To 106) As String * 11 'bits sequence
Dim SymbolCharB(0 To 106) As String * 1 'Chars in B set
Dim SymbolCharC(0 To 106) As String * 2 'Chars in B set
For i = 0 To 106 ' values
SymbolValue(i) = i
Next i
' Symbols in charset B
For i = 0 To 94
SymbolCharB(i) = Chr(i + 32)
Next i
' Symbols in charset C
SymbolCharC(0) = "00"
SymbolCharC(1) = "01"
SymbolCharC(2) = "02"
SymbolCharC(3) = "03"
SymbolCharC(4) = "04"
SymbolCharC(5) = "05"
SymbolCharC(6) = "06"
SymbolCharC(7) = "07"
SymbolCharC(8) = "08"
SymbolCharC(9) = "09"
For i = 10 To 99
SymbolCharC(i) = CStr(i)
Next i
' bit sequences
SymbolString(0) = "11011001100"
SymbolString(1) = "11001101100"
SymbolString(2) = "11001100110"
SymbolString(3) = "10010011000"
SymbolString(4) = "10010001100"
SymbolString(5) = "10001001100"
SymbolString(6) = "10011001000"
SymbolString(7) = "10011000100"
SymbolString(8) = "10001100100"
SymbolString(9) = "11001001000"
SymbolString(10) = "11001000100"
SymbolString(11) = "11000100100"
SymbolString(12) = "10110011100"
SymbolString(13) = "10011011100"
SymbolString(14) = "10011001110"
SymbolString(15) = "10111001100"
SymbolString(16) = "10011101100"
SymbolString(17) = "10011100110"
SymbolString(18) = "11001110010"
SymbolString(19) = "11001011100"
SymbolString(20) = "11001001110"
SymbolString(21) = "11011100100"
SymbolString(22) = "11001110100"
SymbolString(23) = "11101101110"
SymbolString(24) = "11101001100"
SymbolString(25) = "11100101100"
SymbolString(26) = "11100100110"
SymbolString(27) = "11101100100"
SymbolString(28) = "11100110100"
SymbolString(29) = "11100110010"
SymbolString(30) = "11011011000"
SymbolString(31) = "11011000110"
SymbolString(32) = "11000110110"
SymbolString(33) = "10100011000"
SymbolString(34) = "10001011000"
SymbolString(35) = "10001000110"
SymbolString(36) = "10110001000"
SymbolString(37) = "10001101000"
SymbolString(38) = "10001100010"
SymbolString(39) = "11010001000"
SymbolString(40) = "11000101000"
SymbolString(41) = "11000100010"
SymbolString(42) = "10110111000"
SymbolString(43) = "10110001110"
SymbolString(44) = "10001101110"
SymbolString(45) = "10111011000"
SymbolString(46) = "10111000110"
SymbolString(47) = "10001110110"
SymbolString(48) = "11101110110"
SymbolString(49) = "11010001110"
SymbolString(50) = "11000101110"
SymbolString(51) = "11011101000"
SymbolString(52) = "11011100010"
SymbolString(53) = "11011101110"
SymbolString(54) = "11101011000"
SymbolString(55) = "11101000110"
SymbolString(56) = "11100010110"
SymbolString(57) = "11101101000"
SymbolString(58) = "11101100010"
SymbolString(59) = "11100011010"
SymbolString(60) = "11101111010"
SymbolString(61) = "11001000010"
SymbolString(62) = "11110001010"
SymbolString(63) = "10100110000"
SymbolString(64) = "10100001100"
SymbolString(65) = "10010110000"
SymbolString(66) = "10010000110"
SymbolString(67) = "10000101100"
SymbolString(68) = "10000100110"
SymbolString(69) = "10110010000"
SymbolString(70) = "10110000100"
SymbolString(71) = "10011010000"
SymbolString(72) = "10011000010"
SymbolString(73) = "10000110100"
SymbolString(74) = "10000110010"
SymbolString(75) = "11000010010"
SymbolString(76) = "11001010000"
SymbolString(77) = "11110111010"
SymbolString(78) = "11000010100"
SymbolString(79) = "10001111010"
SymbolString(80) = "10100111100"
SymbolString(81) = "10010111100"
SymbolString(82) = "10010011110"
SymbolString(83) = "10111100100"
SymbolString(84) = "10011110100"
SymbolString(85) = "10011110010"
SymbolString(86) = "11110100100"
SymbolString(87) = "11110010100"
SymbolString(88) = "11110010010"
SymbolString(89) = "11011011110"
SymbolString(90) = "11011110110"
SymbolString(91) = "11110110110"
SymbolString(92) = "10101111000"
SymbolString(93) = "10100011110"
SymbolString(94) = "10001011110"
SymbolString(95) = "10111101000"
SymbolString(96) = "10111100010"
SymbolString(97) = "11110101000"
SymbolString(98) = "11110100010"
SymbolString(99) = "10111011110"
SymbolString(100) = "10111101110"
SymbolString(101) = "11101011110"
SymbolString(102) = "11110101110"
SymbolString(103) = "11010000100"
SymbolString(104) = "11010010000"
SymbolString(105) = "11010011100"
SymbolString(106) = "11000111010"
X = X / 0.376042 'mm to pt
Y = Y / 0.341 'mm to pt
Height = Height / 0.341 'mm to pt
If IsNumeric(Content) = True Then ' value is numeric
i = 1 'symbol and weight index
If Len(Content) Mod 2 = 1 Then 'odd
WeightSum = SymbolValue(104) ' start-b
ContentString = ContentString + SymbolString(104)
tstr1 = Mid(Content, 1, 1)
k = 0
Do While tstr1 <> SymbolCharB(k)
k = k + 1
Loop
WeightSum = WeightSum + i * SymbolValue(k)
ContentString = ContentString + SymbolString(k)
i = i + 1
WeightSum = WeightSum + i * SymbolValue(99) 'Code-C
ContentString = ContentString + SymbolString(99) 'Code-C
Content = Right(Content, Len(Content) - 1) 'cut 1st symbol
Else 'even
WeightSum = SymbolValue(105) ' start-c
ContentString = ContentString + SymbolString(105)
i = 0
End If
For j = 1 To Len(Content) Step 2
tstr2 = Mid(Content, j, 2)
i = i + 1
k = 0
Do While tstr2 <> SymbolCharC(k)
k = k + 1
Loop
WeightSum = WeightSum + i * SymbolValue(k)
ContentString = ContentString + SymbolString(k)
Next j
ContentString = ContentString + SymbolString(SymbolValue(WeightSum Mod 103))
ContentString = ContentString + SymbolString(106)
Else ' alpha-numeric
WeightSum = SymbolValue(104) ' start-b
ContentString = ContentString + SymbolString(104)
i = 0 ' symbol count
For j = 1 To Len(Content) Step 1
tstr1 = Mid(Content, j, 1)
i = i + 1
k = 0
Do While tstr1 <> SymbolCharB(k)
k = k + 1
Loop
WeightSum = WeightSum + i * SymbolValue(k)
ContentString = ContentString + SymbolString(k)
Next j
ContentString = ContentString + SymbolString(SymbolValue(WeightSum Mod 103))
ContentString = ContentString + SymbolString(106)
End If
ContentString = ContentString + Tbar_Symbol
'Barcode drawing
CurBar = 0
For i = 1 To Len(ContentString)
Select Case Mid(ContentString, i, 1)
Case 0
CurBar = CurBar + 1
Case 1
CurBar = CurBar + 1
' (CurBar * LineWeight) * [B]0.9[/B] - here is 10% overlapping :-)
With TargetSheet.Shapes.AddLine(X + (CurBar * LineWeight) * 0.9, Y, X + (CurBar * LineWeight) * 0.9, (Y + Height)).Line
.Weight = LineWeight
.ForeColor.RGB = vbBlack ' my Excel writes light-blue lines by default, so the color is forcibly switched
End With
End Select
Next i
End Sub
</code>Barcode reading has been tested by an Android phone (Accusoft Barcode Scanner program) as well as by a PROTON IMS-3100 and a cheap Chineese (PAN.CODE A500) hardware scanners.
Hope it would be of any help to anybody.
Would be helpful for me if you comment this thread when using it in your apps.
Regards,
Yakovleff
