barcode

[thedee23]

I am using barcode 39 but the barcode is too long horizontally(left and right) for my label so what I need to do is figure out how to shorten the barcode without changing the data that is strored in the barcode. I think I can do this by changing the density of the barcode but I don't know how to do this. Can anyone help me with this?

Here is my code:

Dim sValidChars As String
Dim sValidCodes As String
Dim lElevate As Integer
Dim lCounter As Long
Dim lWkValue As Long
Dim PosX As Long
Dim PosY1 As Long
Dim PosY2 As Long
Dim TPX As Long
Dim xMiddle As Single

' pPaintInto.Cls

TPX = 15 'Screen.TwipsPerPixelX

sValidChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*"
sValidCodes = "41914595664727860970419025962647338417105957" + _
"84729059950476626106644590602984801043246599" + _
"62476744460260046477586109044686603224803443" + _
"91860130478424477058030365265828235758580903" + _
"65863556658042365383495434978353624150635770"

sToCode = UCase(IIf(Left(sToCode, 1) = "*", "", "*") + sToCode + IIf(Right(sToCode, 1) = "*", "", "*"))
PosX = (rX1 + (rX2 - rX1) / 2) - (((Len(sToCode) * 16) / 2) * TPX) - 1
' PosX = ((((pPaintInto.Width / TPX) - (Len(sToCode) * 16)) / 2) * TPX) - 1
' PosY1 = pPaintInto.Height * 0.2
' PosY2 = pPaintInto.Height * 0.8



' If PosX < 0 Then
' MsgBox "The length of the code exceeds control limits.", vbExclamation, "Large string"
' GoTo End_Code
' End If

On Error Resume Next


'PosX = rX1
For lCounter = 1 To Len(sToCode)
'Here is where the number is fetched fro
' m the sValidCodes string. It will get on
' ly 5 digits.
lWkValue = Val(Mid(sValidCodes, ((InStr(1, sValidChars, Mid(sToCode, lCounter, 1)) - 1) * 5) + 1, 5))
lWkValue = IIf(lWkValue = 0, 36538, lWkValue)


For lElevate = 15 To 0 Step -1
'It evaluates the binary number to see i
' f it has to draw a line.


If lWkValue >= 2 ^ lElevate Then
' pPaintInto.Line (PosX, PosY1)-(PosX, PosY2)
vspCurrent.DrawLine PosX, rY1 + 0.05 * TPI, _
PosX, RY1+rBarHeight
lWkValue = lWkValue - (2 ^ lElevate)
End If
PosX = PosX + TPX
Next
Next
' pLabelInto.caption = Mid(sToCode, 2, Len(sToCode) - 2)
End_Code:

[jim mcnamara]

Since you're printing barcode your printer driver can support the
Printer.Zoom method. You use this method to scale down the size of the object output on paper.

We've used it on five or six different barocde projects.

Also, barcodes are usually supplied as TrueType fonts. You can
simply change the font size from say 10 to 9.

The printer object supports fontsize, also.

[thedee23]

I guess I am not using any font because drawing lines is basically what I am doing and changing the font doesn't change anything. This is a barcode font free routine....

[dbarr]

To me it looks as if you change yor TPX value, it will have an immediate effect on your density. if change other values you may change the ratios associated with wide bars and narrow bars. That would be a bad thing. Hope this helps.