I have attempted to modify this code to work from VB6 which it does, to VB.Net but VB.Net doesnt like the .NewIndex and I have already checked the MSDN and attemped to change it to what they recommended and still doesnt work.

The msdn said to use SelectedIndex but when i run it i get:
An unhandled exception of type 'System.Exception' occurred in microsoft.visualbasic.dll
Additional information: Invalid property array index

After the upgrade these are the upgrade error's I got: I provided as much info as i could so i hope it helps you guys out.
1) 'UPGRADE_ISSUE: ListBox property List1.NewIndex was not upgraded. Click for more: 'ms-help://MS.VSCC/commoner/redir/redirect.htm?keyword="vbup2059"'
And in the module
1) 'UPGRADE_WARNING: Get was upgraded to FileGet and has a new behavior. Click for more: 'ms-help://MS.VSCC/commoner/redir/redirect.htm?keyword="vbup1041"'
2) 'UPGRADE_WARNING: Dir has a new behavior. Click for more: 'ms-help://MS.VSCC/commoner/redir/redirect.htm?keyword="vbup1041"'
3) 'UPGRADE_WARNING: Put was upgraded to FilePut and has a new behavior. Click for more: 'ms-help://MS.VSCC/commoner/redir/redirect.htm?keyword="vbup1041"'


Any help greatly appriciated!
VB Code:
  1. Private Sub Command1_Click()
  2.     Dim lNewRec As Long
  3.     'Store the info and return the record number
  4.     lNewRec = StoreURL(urld.Text, urll.Text)
  5.       MsgBox "Record Number " & lNewRec & " was added to the file"
  6.    
  7.     'add display name to the list
  8.     List1.AddItem urld.Text
  9.     'store the record number in the itemdata property so we can retrieve it later
  10.     'see List1_DoubleClick
  11.     List1.ItemData(List1.NewIndex) = lNewRec
  12.  
  13. End Sub
  14.  
  15. Private Sub Command2_Click()
  16.     Dim lCounter As Long
  17.     Dim sName As String
  18.     Dim sLocal As String
  19.    
  20.     List1.Clear
  21.     Do
  22.         lCounter = lCounter + 1
  23.         RetreiveURL lCounter, sName, sLocal
  24.         If Len(Trim$(sName)) > 0 Then
  25.             'add the display name to the list
  26.             List1.AddItem sName
  27.             'store the record number in the itemdata property so we can retrieve it later
  28.             'see List1_DoubleClick
  29.             List1.ItemData(List1.NewIndex) = lCounter
  30.         Else
  31.             Exit Do
  32.         End If
  33.     Loop
  34. End Sub
  35. Private Sub List1_DblClick()
  36.     Dim lCounter As Long
  37.     Dim sName As String
  38.     Dim sLocal As String
  39.     'get the url storeed at the record according to the itemdata property
  40.     RetreiveURL CLng(List1.ItemData(List1.ListIndex)), sName, sLocal
  41.  
  42.     MsgBox sName & vbCrLf & sLocal
  43. End Sub

And this is the module.

VB Code:
  1. Option Explicit
  2.  
  3. Private Type tURLInfo
  4.     sURLName As String * 260
  5.     sURL  As String * 260
  6. End Type
  7. Public Sub RetreiveURL(lRecNum As Long, sURLName As String, sURL As String)
  8.     Dim lFreeFile  As Long
  9.     Dim URLInfo As tURLInfo
  10.     Dim sFileName As String
  11.    
  12.     sFileName = App.Path & "\URL.dat"
  13.    
  14.     lFreeFile = FreeFile
  15.     Open sFileName For Random As lFreeFile Len = Len(URLInfo)
  16.         'Get the requested record from the file
  17.         Get #lFreeFile, lRecNum, URLInfo
  18.        
  19.         'clean up the info and populate vars
  20.         sURLName = Trim$(StripTerminator(URLInfo.sURLName))
  21.         sURL = Trim$(StripTerminator(URLInfo.sURL))
  22.        
  23.     Close lFreeFile
  24.  
  25. End Sub
  26. Public Function StripTerminator(ByVal strString As String) As String
  27.     Dim intZeroPos As Long
  28.     intZeroPos = InStr(strString, Chr$(0))
  29.     If intZeroPos > 0 Then
  30.         StripTerminator = Left$(strString, intZeroPos - 1)
  31.     Else
  32.         StripTerminator = strString
  33.     End If
  34. End Function
  35.  
  36.  
  37.  
  38.  
  39. Public Function StoreURL(sURLName As String, sURL As String) As Long
  40.     Dim lFreeFile  As Long
  41.     Dim lRecNum As Long
  42.     Dim URLInfo As tURLInfo
  43.     Dim sFileName As String
  44.    
  45.     sFileName = App.Path & "\URL.dat"
  46.    
  47.     'Get the record number of the next available record
  48.     If Len(Dir$(sFileName)) > 0 Then
  49.         lRecNum = FileLen(sFileName) / Len(URLInfo) + 1
  50.     Else
  51.         lRecNum = 1
  52.     End If
  53.    
  54.     'open the file
  55.     lFreeFile = FreeFile
  56.     Open sFileName For Random As lFreeFile Len = Len(URLInfo)
  57.         'populate the UDT with the info
  58.         URLInfo.sURLName = sURLName
  59.         URLInfo.sURL = sURL
  60.  
  61.         'put it in the file at the next record local
  62.         Put #lFreeFile, lRecNum, URLInfo
  63.     Close lFreeFile
  64.    
  65.     StoreURL = lRecNum
  66. End Function