Hvordan kan jeg Finde alle kendte filtyper i registry og få dem vist i en listbox?

Jeg har fundet et meget gammelt eksempel som virker fint i VB6 men ikke i VB.net og har brug for hjælp med oversættelse..

Private Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Private Declare Function RegEnumKey Lib "advapi32.dll" Alias "RegEnumKeyA" (ByVal hKey As Long, ByVal dwIndex As Long, ByVal lpName As String, ByVal cbName As Long) As Long
Private Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Private Declare Function RegQueryValueEx Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As Any, lpcbData As Long) As Long
Private Declare Function DrawIconEx Lib "user32" (ByVal hdc As Long, ByVal xLeft As Long, ByVal yTop As Long, ByVal hIcon As Long, ByVal cxWidth As Long, ByVal cyWidth As Long, ByVal istepIfAniCur As Long, ByVal hbrFlickerFreeDraw As Long, ByVal diFlags As Long) As Long
Private Declare Function ExtractIcon Lib "shell32.dll" Alias "ExtractIconA" (ByVal hInst As Long, ByVal lpszExeFileName As String, ByVal nIconIndex As Long) As Long

Private Const HKEY_CLASSES_ROOT = &H80000000

Private aIcons() As String

Private Sub Form_Load()
    Dim sType As String        'Ext.
    Dim sName As String        'Name of File Type
    Dim sFile As String        'File Used For Default Icon
    Dim iIndex As Integer
    Dim lRegKey As Long
   
    List1.FontName = "Courier"
    iIndex = 1
    sType = Space(255)
    'Enumerate all Extensions in the CLASSES Hive..
    Do While RegEnumKey(HKEY_CLASSES_ROOT, iIndex, ByVal sType, 255) = 0
        If Left(sType, 1) <> "." Then Exit Do
        'Store Icon Info in an Array Linked by ListIndex
        ReDim Preserve aIcons(iIndex - 1)
        sType = Left(sType, InStr(sType, Chr(0)) - 1)
        'Get this Extensions Name, eg - .zip = WinZip
        If RegOpenKey(HKEY_CLASSES_ROOT, ByVal sType, lRegKey) = 0 Then
            sName = Space(255)
            Call RegQueryValueEx(lRegKey, ByVal "", 0&, 1, ByVal sName, 255)
            If InStr(sName, Chr(0)) Then sName = Left(sName, InStr(sName, Chr(0)) - 1)
            Call RegCloseKey(lRegKey)
            If Len(Trim(sName)) Then
                'Look for a Default Icon for this Type..
                If RegOpenKey(HKEY_CLASSES_ROOT, sName & "\DefaultIcon\", lRegKey) = 0 Then
                    sFile = Space(255)
                    Call RegQueryValueEx(lRegKey, ByVal "", 0&, 1, ByVal sFile, 255)
                    If InStr(sFile, Chr(0)) Then sFile = Left(sFile, InStr(sFile, Chr(0)) - 1)
                    Call RegCloseKey(lRegKey)
                    aIcons(iIndex - 1) = sFile
                End If
            End If
        End If
        List1.AddItem Left(sType & Space(10), 10) & " - " & sName
        sType = Space(255)
        iIndex = iIndex + 1
    Loop
End Sub

Private Sub List1_Click()
    Dim sFile As String
    Dim iIndex As Integer
    Dim lIcon As Long
   
    Picture1.Cls
    On Error GoTo IconErr
    'Get the Icon from the File Stored in the Array for this File Type
    sFile = Left$(aIcons(List1.ListIndex), InStr(aIcons(List1.ListIndex), ",") - 1)
    iIndex = Val(Mid$(aIcons(List1.ListIndex), InStr(aIcons(List1.ListIndex), ",") + 1))
    lIcon = ExtractIcon(App.hInstance, sFile, iIndex)
    Call DrawIconEx(Picture1.hdc, 0, 0, lIcon, 32, 32, 0, 0, 3)
IconErr:
End Sub