Parses a VBL file name and extracts the license key for the registry and license information

'-----------------------------------------------------------
' SUB: GetLicInfoFromVBL
' Parses a VBL file name and extracts the license key for
' the registry and license information.
'
' IN: [strVBLFile] - must be a valid VBL.
'
' OUT: [strLicKey] - registry key to write license info to.
'                    This key will be added to
'                    HKEY_CLASSES_ROOT\Licenses.  It is a
'                    guid.
' OUT: [strLicVal] - license information.  Usually in the
'                    form of a string of cryptic characters.
'-----------------------------------------------------------
'
Public Sub GetLicInfoFromVBL(strVBLFile As String, strLicKey As String, strLicVal As String)
    Dim fn As Integer
    Const strREGEDIT = "REGEDIT"
    Const strLICKEYBASE = "HKEY_CLASSES_ROOT\Licenses\"
    Dim strTemp As String
    Dim posEqual As Integer
    Dim fLicFound As Boolean

    fn = FreeFile
    Open strVBLFile For Input Access Read Lock Read Write As #fn
    '
    ' Read through the file until we find a line that starts with strLICKEYBASE
    '
    fLicFound = False
    Do While Not EOF(fn)
        Line Input #fn, strTemp
        strTemp = Trim(strTemp)
        If Left$(strTemp, Len(strLICKEYBASE)) = strLICKEYBASE Then
            '
            ' We've got the line we want.
            '
            fLicFound = True
            Exit Do
        End If
    Loop

    Close fn

    If fLicFound Then
        '
        ' Parse the data on this line to split out the
        ' key and the license info.  The line should be
        ' the form of:
        ' "HKEY_CLASSES_ROOT\Licenses\<lickey> = <licval>"
        '
        posEqual = InStr(strTemp, gstrASSIGN)
        If posEqual > 0 Then
            strLicKey = Mid$(Trim(Left$(strTemp, posEqual - 1)), Len(strLICKEYBASE) + 1)
            strLicVal = Trim(Mid$(strTemp, posEqual + 1))
        End If
    Else
        strLicKey = vbNullString
        strLicVal = vbNullString
    End If
End Sub