Membuat Program Barcode

Kode di bawah ini akan menunjukkan cara untuk input data ke dalam kotak teks dan mendapatkan barcode dari gambar itu. Anda juga akan mempelajari bagaimana untuk bekerja dengan clipboard checksum dan kontrol.

Untuk menggunakan, baru memulai Visual Basic Proyek, menambahkan formulir untuk proyek dan paste kode di bawah ini ke dalamnya. Anda akan memiliki visual untuk membuat kotak (qty4), tombol perintah, frame (qty2), label, tombol pilihan (qty4), gambar kotak (qty2) dan kotak teks.

Berikut tampilan preview dari program barcode maker yang kita akan buat.Untuk desain anda bisa membuat sesuai dengan

Option Explicit
Dim BCtype As Long

Private Sub makeBC()
Select Case BCtype
Case 0
make39
Case 1
makei25
Case 2
make128
Case 3
makeCodabar
End Select
End Sub

Private Sub make39()
Dim x As Long, y As Long, pos As Long
Dim Bardata As String
Dim Cur As String
Dim CurVal As Long
Dim chksum As Long
Dim chkchr As String
Dim temp As String
Dim BC(43) As String
'3 of the 9 elements are wide: 0=narrow, 1=wide
BC(0) = "000110100" '0
BC(1) = "100100001" '1
BC(2) = "001100001" '2
BC(3) = "101100000" '3
BC(4) = "000110001" '4
BC(5) = "100110000" '5
BC(6) = "001110000" '6
BC(7) = "000100101" '7
BC(8) = "100100100" '8
BC(9) = "001100100" '9
BC(10) = "100001001" 'A
BC(11) = "001001001" 'B
BC(12) = "101001000" 'C
BC(13) = "000011001" 'D
BC(14) = "100011000" 'E
BC(15) = "001011000" 'F
BC(16) = "000001101" 'G
BC(17) = "100001100" 'H
BC(18) = "001001100" 'I
BC(19) = "000011100" 'J
BC(20) = "100000011" 'K
BC(21) = "001000011" 'L
BC(22) = "101000010" 'M
BC(23) = "000010011" 'N
BC(24) = "100010010" 'O
BC(25) = "001010010" 'P
BC(26) = "000000111" 'Q
BC(27) = "100000110" 'R
BC(28) = "001000110" 'S
BC(29) = "000010110" 'T
BC(30) = "110000001" 'U
BC(31) = "011000001" 'V
BC(32) = "111000000" 'W
BC(33) = "010010001" 'X
BC(34) = "110010000" 'Y
BC(35) = "011010000" 'Z
BC(36) = "010000101" '-
BC(37) = "110000100" '.
BC(38) = "011000100" '
BC(39) = "010101000" '$
BC(40) = "010100010" '/
BC(41) = "010001010" '+
BC(42) = "000101010" '%
BC(43) = "010010100" '* (used for start/stop character only)

Picture1.Cls
If Text1.Text = "" Then Exit Sub
pos = 20
Bardata = UCase(Text1.Text)

'Check for invalid characters, build temp string & calculate check sum
For x = 1 To Len(Bardata)
Cur = Mid$(Bardata, x, 1)
Select Case Cur
Case "0" To "9"
CurVal = Val(Cur)
Case "A" To "Z"
CurVal = Asc(Cur) - 55
Case "-"
CurVal = 36
Case "."
CurVal = 37
Case " "
CurVal = 38
Case "$"
CurVal = 39
Case "/"
CurVal = 40
Case "+"
CurVal = 41
Case "%"
CurVal = 42
Case Else 'oops!
Picture1.Print Cur & " is Invalid"
Exit Sub
End Select
temp = temp & BC(CurVal) & "0" '"0"= add intercharactor gap (1 narrow space)
chksum = chksum + CurVal
Next

'Add Check Character? (rarely used, but i put it here anyway...)
If Check1(2).Value Then
chksum = chksum Mod 43
temp = temp & BC(chksum) & "0"
chkchr = Mid$("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*", chksum + 1, 1)
End If

'Add Start & Stop characters (must have 'em for valid barcodes)
temp = BC(43) & "0" & temp & BC(43)

'Generate Barcode
For x = 1 To Len(temp)
If x Mod 2 = 0 Then
'SPACE
pos = pos + 1 + (2 * Val(Mid$(temp, x, 1))) + Check1(0).Value
Else
'BAR
For y = 1 To 1 + (2 * Val(Mid$(temp, x, 1)))
Picture1.Line (pos, 1)-(pos, 58 - Check1(1) * 8)
pos = pos + 1
Next
End If
Next

'Add Label?
If Check1(1).Value Then
Picture1.CurrentX = 35 + Len(Bardata) * (5 + Check1(0).Value * 2) 'kinda center
Picture1.CurrentY = 50
Picture1.Print Bardata & chkchr;
End If
End Sub

Private Sub makei25()
Dim x As Long, y As Long, pos As Long
Dim Bardata As String
Dim Cur As String
Dim temp As String
Dim chksum As Long
Dim BC(11) As String
'2 of the 5 elements are wide: 0=narrow, 1=wide
BC(0) = "00110" '0
BC(1) = "10001" '1
BC(2) = "01001" '2
BC(3) = "11000" '3
BC(4) = "00101" '4
BC(5) = "10100" '5
BC(6) = "01100" '6
BC(7) = "00011" '7
BC(8) = "10010" '8
BC(9) = "01010" '9
BC(10) = "0000" 'Start chr
BC(11) = "100" 'Stop chr

Picture1.Cls
If Text1.Text = "" Then Exit Sub
pos = 20
Bardata = Text1.Text

'make even num of digits by adding a leading 0
If Len(Bardata) Mod 2 And Not Check1(2).Value Then Bardata = "0" & Bardata
If Not (Len(Bardata) Mod 2) And Check1(2).Value Then Bardata = "0" & Bardata

'Check for invalid characters and calculate check sum
For x = 1 To Len(Bardata)
Cur = Mid$(Bardata, x, 1)
If Cur < "0" Or Cur > "9" Then
Picture1.Print Cur & " is Invalid"
Exit Sub
End If
'make checksum
If x Mod 2 Then
chksum = chksum + CLng(Cur) * 3
Else
chksum = chksum + CLng(Cur)
End If
Next

'add check chr to bardata (if selected)
If Check1(2).Value Then
chksum = (10 - chksum Mod 10) Mod 10
Bardata = Bardata & Chr$(48 + chksum)
End If

'interleave the code into a temp string - what'd you think the name meant?
For x = 1 To Len(Bardata) Step 2
For y = 1 To 5
temp = temp & Mid$(BC(Val(Mid$(Bardata, x, 1))), y, 1)
temp = temp & Mid$(BC(Val(Mid$(Bardata, x + 1, 1))), y, 1)
Next
Next

'add Start & Stop characters
temp = BC(10) & temp & BC(11)

'Generate Barcode
For x = 1 To Len(temp)
If x Mod 2 = 0 Then
'SPACE
pos = pos + 1 + (2 * Val(Mid$(temp, x, 1))) + Check1(0).Value
Else
'BAR
For y = 1 To 1 + (2 * Val(Mid$(temp, x, 1)))
Picture1.Line (pos, 1)-(pos, 58 - Check1(1) * 8)
pos = pos + 1
Next
End If
Next

'Add Label?
If Check1(1).Value Then
Picture1.CurrentX = 20 + Len(Bardata) * (2 + Check1(0).Value * 1.3) 'kinda center
Picture1.CurrentY = 50
Picture1.Print Bardata;
End If
End Sub

Private Sub make128()
Dim x As Long, y As Long, pos As Long
Dim Bardata As String
Dim Cur As String
Dim CurVal As Long
Dim chksum As Long
Dim temp As String
Dim BC(106) As String
'code 128 is basically the ASCII chr set.
'4 element sizes : 1=narrowest, 4=widest
BC(0) = "212222" '
BC(1) = "222122" '!
BC(2) = "222221" '"
BC(3) = "121223" '#
BC(4) = "121322" '$
BC(5) = "131222" '%
BC(6) = "122213" '&
BC(7) = "122312" ''
BC(8) = "132212" '(
BC(9) = "221213" ')
BC(10) = "221312" '*
BC(11) = "231212" '+
BC(12) = "112232" ',
BC(13) = "122132" '-
BC(14) = "122231" '.
BC(15) = "113222" '/
BC(16) = "123122" '0
BC(17) = "123221" '1
BC(18) = "223211" '2
BC(19) = "221132" '3
BC(20) = "221231" '4
BC(21) = "213212" '5
BC(22) = "223112" '6
BC(23) = "312131" '7
BC(24) = "311222" '8
BC(25) = "321122" '9
BC(26) = "321221" ':
BC(27) = "312212" ';
BC(28) = "322112" '<>
BC(31) = "212321" '?
BC(32) = "232121" '@
BC(33) = "111323" 'A
BC(34) = "131123" 'B
BC(35) = "131321" 'C
BC(36) = "112313" 'D
BC(37) = "132113" 'E
BC(38) = "132311" 'F
BC(39) = "211313" 'G
BC(40) = "231113" 'H
BC(41) = "231311" 'I
BC(42) = "112133" 'J
BC(43) = "112331" 'K
BC(44) = "132131" 'L
BC(45) = "113123" 'M
BC(46) = "113321" 'N
BC(47) = "133121" 'O
BC(48) = "313121" 'P
BC(49) = "211331" 'Q
BC(50) = "231131" 'R
BC(51) = "213113" 'S
BC(52) = "213311" 'T
BC(53) = "213131" 'U
BC(54) = "311123" 'V
BC(55) = "311321" 'W
BC(56) = "331121" 'X
BC(57) = "312113" 'Y
BC(58) = "312311" 'Z
BC(59) = "332111" '[
BC(60) = "314111" '\
BC(61) = "221411" ']
BC(62) = "431111" '^
BC(63) = "111224" '_
BC(64) = "111422" '`
BC(65) = "121124" 'a
BC(66) = "121421" 'b
BC(67) = "141122" 'c
BC(68) = "141221" 'd
BC(69) = "112214" 'e
BC(70) = "112412" 'f
BC(71) = "122114" 'g
BC(72) = "122411" 'h
BC(73) = "142112" 'i
BC(74) = "142211" 'j
BC(75) = "241211" 'k
BC(76) = "221114" 'l
BC(77) = "413111" 'm
BC(78) = "241112" 'n
BC(79) = "134111" 'o
BC(80) = "111242" 'p
BC(81) = "121142" 'q
BC(82) = "121241" 'r
BC(83) = "114212" 's
BC(84) = "124112" 't
BC(85) = "124211" 'u
BC(86) = "411212" 'v
BC(87) = "421112" 'w
BC(88) = "421211" 'x
BC(89) = "212141" 'y
BC(90) = "214121" 'z
BC(91) = "412121" '{
BC(92) = "111143" '|
BC(93) = "111341" '}
BC(94) = "131141" '~
BC(95) = "114113" ' *not used in this sub
BC(96) = "114311" 'FNC 3 *not used in this sub
BC(97) = "411113" 'FNC 2 *not used in this sub
BC(98) = "411311" 'SHIFT *not used in this sub
BC(99) = "113141" 'CODE C *not used in this sub
BC(100) = "114131" 'FNC 4 *not used in this sub
BC(101) = "311141" 'CODE A *not used in this sub
BC(102) = "411131" 'FNC 1 *not used in this sub
BC(103) = "211412" 'START A *not used in this sub
BC(104) = "211214" 'START B
BC(105) = "211232" 'START C *not used in this sub
BC(106) = "2331112" 'STOP

Picture1.Cls
If Text1.Text = "" Then Exit Sub
pos = 20
Bardata = Text1.Text

'Check for invalid characters, calculate check sum & build temp string
For x = 1 To Len(Bardata)
Cur = Mid$(Bardata, x, 1)
If Cur < " " Or Cur > "~" Then
Picture1.Print "Invalid Character(s)"
Exit Sub
End If
CurVal = Asc(Cur) - 32
temp = temp + BC(CurVal)
chksum = chksum + CurVal * x
Next

'Add start, stop & check characters
chksum = (chksum + 104) Mod 103
temp = BC(104) & temp & BC(chksum) & BC(106)

'Generate Barcode
For x = 1 To Len(temp)
If x Mod 2 = 0 Then
'SPACE
pos = pos + (Val(Mid$(temp, x, 1))) + Check1(0).Value
Else
'BAR
For y = 1 To (Val(Mid$(temp, x, 1)))
Picture1.Line (pos, 1)-(pos, 58 - Check1(1) * 8)
pos = pos + 1
Next
End If
Next

'Add Label?
If Check1(1).Value Then
Picture1.CurrentX = 30 + Len(Bardata) * (3 + Check1(0).Value * 2) 'kinda center
Picture1.CurrentY = 50
Picture1.Print Bardata;
End If
End Sub

Private Sub makeCodabar()
Dim x As Long, y As Long, pos As Long
Dim Bardata As String
Dim Cur As String
Dim CurVal As Long
Dim temp As String
Dim BC(19) As String
'Codabar, also known as NW-7
BC(0) = "0000011" '0
BC(1) = "0000110" '1
BC(2) = "0001001" '2
BC(3) = "1100000" '3
BC(4) = "0010010" '4
BC(5) = "1000010" '5
BC(6) = "0100001" '6
BC(7) = "0100100" '7
BC(8) = "0110000" '8
BC(9) = "1001000" '9
BC(10) = "0001100" '-
BC(11) = "0011000" '$
BC(12) = "1000101" ':
BC(13) = "1010001" '/
BC(14) = "1010100" '.
BC(15) = "0010101" '+
BC(16) = "0011010" 'start/stop A
BC(17) = "0101001" 'start/stop B
BC(18) = "0001011" 'start/stop C
BC(19) = "0001110" 'start/stop D

Picture1.Cls
If Text1.Text = "" Then Exit Sub
pos = 20
Bardata = Text1.Text

For x = 1 To Len(Bardata)
Cur = Mid$(Bardata, x, 1)
Select Case Cur
Case "0" To "9"
CurVal = Val(Cur)
Case "a" To "d"
CurVal = Asc(Cur) - 81
Case "-"
CurVal = 10
Case "$"
CurVal = 11
Case ":"
CurVal = 12
Case "/"
CurVal = 13
Case "."
CurVal = 14
Case "+"
CurVal = 15
Case Else 'oops!
Picture1.Print Cur & " is Invalid"
Exit Sub
End Select
temp = temp & BC(CurVal) & "0" '"0"= add intercharactor gap (1 narrow space)
Next

'Add Start & Stop characters (using "A" for both here)
temp = BC(16) & "0" & temp & BC(16)

'Generate Barcode
For x = 1 To Len(temp)
If x Mod 2 = 0 Then
'SPACE
pos = pos + 1 + (2 * Val(Mid$(temp, x, 1))) + Check1(0).Value
Else
'BAR
For y = 1 To 1 + (2 * Val(Mid$(temp, x, 1)))
Picture1.Line (pos, 1)-(pos, 58 - Check1(1) * 8)
pos = pos + 1
Next
End If
Next

'Add Label?
If Check1(1).Value Then
Picture1.CurrentX = 30 + Len(Bardata) * (3 + Check1(0).Value * 2) 'kinda center
Picture1.CurrentY = 50
Picture1.Print Bardata;
End If
End Sub

Private Sub Form_Resize()
Picture1.Width = Form1.Width - 360
makeBC
End Sub

Private Sub Option1_Click(Index As Integer)
Select Case Index
Case 0
Check1(2).ToolTipText = "Optional"
Check1(2).Value = 0
Check1(2).Enabled = True
Case 1
Check1(2).ToolTipText = "Optional"
Check1(2).Value = 0
Check1(2).Enabled = True
Case 2
Check1(2).ToolTipText = "Not optional"
Check1(2).Value = 1
Check1(2).Enabled = False
Case 3
Check1(2).ToolTipText = "Not used"
Check1(2).Value = 0
Check1(2).Enabled = False
End Select
BCtype = Index
makeBC
End Sub

Private Sub Text1_Change()
makeBC
End Sub

Private Sub Check1_Click(Index As Integer)
makeBC
End Sub

Private Sub Command1_Click()
Clipboard.Clear
Clipboard.SetData Picture1.Image
End Sub