Const ERROR_NO_MORE_ITEMS = 259&
Const HKEY_CURRENT_CONFIG = &H80000005
Const HKEY_LOCAL_MACHINE = &H80000002
Private Declare Function RegCloseKey Lib "advapi32.dll" _
  (ByVal hKey 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 RegEnumKeyEx Lib "advapi32.dll" _
  Alias "RegEnumKeyExA" (ByVal hKey As Long, ByVal dwIndex _
  As Long, ByVal lpName As String, lpcbName As Long, _
  ByVal lpReserved As Long, ByVal lpClass As String, _
  lpcbClass As Long, lpftLastWriteTime As Any) As Long
Private Declare Function RegEnumValue Lib "advapi32.dll" _
  Alias "RegEnumValueA" (ByVal hKey As Long, ByVal dwIndex _
  As Long, ByVal lpValueName As String, lpcbValueName _
  As Long, ByVal lpReserved As Long, lpType As Long, _
  lpData As Any, lpcbData As Long) As Long
 
Private Sub Form_Load()
    'KPD-Team 2001
    'URL: http://www.allapi.net/
    'E-Mail: KPDTeam@Allapi.net
    Dim hKey As Long, Cnt As Long, sName As String, _
      sData As String, Ret As Long, RetData As Long
    Const BUFFER_SIZE As Long = 255
    'Set the forms graphics mode to persistent
    Me.AutoRedraw = True
    Me.Print "RegEnumKeyEx"
    Ret = BUFFER_SIZE
    'Open the registry key
    If RegOpenKey(HKEY_LOCAL_MACHINE, "Hardware", hKey) = 0 Then
        'Create a buffer
        sName = Space(BUFFER_SIZE)
        'Enumerate the keys
        While RegEnumKeyEx(hKey, Cnt, sName, Ret, ByVal 0&, _
          vbNullString, ByVal 0&, ByVal 0&) <> ERROR_NO_MORE_ITEMS
            'Show the enumerated key
            Me.Print "  " + Left$(sName, Ret)
            'prepare for the next key
            Cnt = Cnt + 1
            sName = Space(BUFFER_SIZE)
            Ret = BUFFER_SIZE
        Wend
        'close the registry key
        RegCloseKey hKey
    Else
        Me.Print "  Error while calling RegOpenKey"
    End If
    Me.Print vbCrLf + "RegEnumValue"
    Cnt = 0
    'Open a registry key
    If RegOpenKey(HKEY_LOCAL_MACHINE, _
      "SoftwareMicrosoftWindowsCurrentVersion", hKey) = 0 Then
        'initialize
        sName = Space(BUFFER_SIZE)
        sData = Space(BUFFER_SIZE)
        Ret = BUFFER_SIZE
        RetData = BUFFER_SIZE
        'enumerate the values
        While RegEnumValue(hKey, Cnt, sName, Ret, 0, _
          ByVal 0&, ByVal sData, RetData) <> ERROR_NO_MORE_ITEMS
            'show data
            If RetData > 0 Then Me.Print "  " + _
              Left$(sName, Ret) + "=" + Left$(sData, RetData - 1)
            'prepare for next value
            Cnt = Cnt + 1
            sName = Space(BUFFER_SIZE)
            sData = Space(BUFFER_SIZE)
            Ret = BUFFER_SIZE
            RetData = BUFFER_SIZE
        Wend
        'Close the registry key
        RegCloseKey hKey
    Else
        Me.Print "  Error while calling RegOpenKey"
    End If
End Sub