UDF problem in converting data into code 128 B

[Safi]

Function Format_Code128 (InString As String) As String
Dim Sum As Integer, i As Integer
Dim Checksum As Integer, Checkchar As Integer
Dim MyString As String, CVal As Integer


' Initialize running total with value of
' Subset B start character

Sum = 104

' Scan the string and add character value times position

For i = 1 To Len(InString)

' Copy one character from InString position i to MyString

MyString = Mid$(InString, i, 1)

' Get the numeric value of the character and subtract
' 32 to shift (the space character, ASCII value 32, has
' a numeric value of 0 as far as Code 128 is concerned)

CVal = Asc(MyString) - 32

' Add the weighted value into the running sum

Sum = Sum + (CVal * i)
Next i

' Calculate the Modulo 103 checksum

Checksum = Sum Mod 103

' Now convert this number to a character.

If Checkdigit = 0 Then
Checkchar = 174
ElseIf Checkdigit < 94 Then
Checkchar = Checkdigit + 32
Else
Checkchar = Checkdigit + 71
End If
'
' Now format the final output string: start character,
' data, check character, and stop character
'
MyString = Chr(162) + InString + Chr(Checkchar) + Chr(164)
Format_Code128 = MyString
End Function

I Have coded above UDF to construct data (my data is like "CCF001257") the
UDF returns value as

¢CCF001257®¤ but when I changed this into 128 font and took printout the
scanner is not reconging it..what will be the problem..will any one trace out
...i have a doubt..
1.code 128 and code 128 B fonts are different if so..
2. shall i have to use Code 128 B font

does this will slove..

Plz tell me soon...

Regards,

safi.