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  Visual Basic    (ActiveX/Controles/DLL)

Título da Dica:  Criando Backup de um determinado valor do registro do windows
Postada em 9/12/2004 por Josefh Hennyere      Clique aqui para enviar email para o autor  hennyere@hotmail.com
'Insira dois botões de comando no form

Const HKEY_CLASSES_ROOT = &H80000000
Const HKEY_CURRENT_USER = &H80000001
Const HKEY_LOCAL_MACHINE = &H80000002
Const HKEY_USERS = &H80000003
Const HKEY_PERFORMANCE_DATA = &H80000004
Const HKEY_CURRENT_CONFIG = &H80000005
Const HKEY_DYN_DATA = &H80000006

Const TOKEN_QUERY As Long = &H8&
Const TOKEN_ADJUST_PRIVILEGES As Long = &H20&
Const SE_PRIVILEGE_ENABLED As Long = &H2
Const SE_RESTORE_NAME = "SeRestorePrivilege"
Const SE_BACKUP_NAME = "SeBackupPrivilege"
Const REG_FORCE_RESTORE As Long = 8&
Const READ_CONTROL = &H20000
Const SYNCHRONIZE = &H100000
Const STANDARD_RIGHTS_READ = (READ_CONTROL)
Const STANDARD_RIGHTS_WRITE = (READ_CONTROL)
Const STANDARD_RIGHTS_ALL = &H1F0000
Const SPECIFIC_RIGHTS_ALL = &HFFFF
Const KEY_QUERY_VALUE = &H1
Const KEY_SET_VALUE = &H2
Const KEY_CREATE_SUB_KEY = &H4
Const KEY_ENUMERATE_SUB_KEYS = &H8
Const KEY_NOTIFY = &H10
Const KEY_CREATE_LINK = &H20
Const KEY_READ = ((STANDARD_RIGHTS_READ Or KEY_QUERY_VALUE Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY) And (Not SYNCHRONIZE))
Const KEY_ALL_ACCESS = ((STANDARD_RIGHTS_ALL Or KEY_QUERY_VALUE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY Or KEY_CREATE_LINK) And (Not SYNCHRONIZE))
Private Type LUID
   lowpart As Long
   highpart As Long
End Type
Private Type LUID_AND_ATTRIBUTES
   pLuid As LUID
   Attributes As Long
End Type
Private Type TOKEN_PRIVILEGES
   PrivilegeCount As Long
   Privileges As LUID_AND_ATTRIBUTES
End Type
Private Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Private Declare Function RegOpenKeyEx Lib "advapi32.dll" Alias "RegOpenKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal ulOptions As Long, ByVal samDesired As Long, phkResult As Long) As Long
Private Declare Function RegRestoreKey Lib "advapi32.dll" Alias "RegRestoreKeyA" (ByVal hKey As Long, ByVal lpFile As String, ByVal dwFlags As Long) As Long
Private Declare Function AdjustTokenPrivileges Lib "advapi32.dll" (ByVal TokenHandle As Long, ByVal DisableAllPriv As Long, NewState As TOKEN_PRIVILEGES, ByVal BufferLength As Long, PreviousState As TOKEN_PRIVILEGES, ReturnLength As Long) As Long
Private Declare Function LookupPrivilegeValue Lib "advapi32.dll" Alias "LookupPrivilegeValueA" (ByVal lpSystemName As Any, ByVal lpName As String, lpLuid As LUID) As Long
Private Declare Function OpenProcessToken Lib "advapi32.dll" (ByVal ProcessHandle As Long, ByVal DesiredAccess As Long, TokenHandle As Long) As Long
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long
Private Declare Function RegSaveKey Lib "advapi32.dll" Alias "RegSaveKeyA" (ByVal hKey As Long, ByVal lpFile As String, lpSecurityAttributes As Any) As Long

Dim sFile As String

Function EnablePrivilege(seName As String) As Boolean
    Dim p_lngRtn As Long
    Dim p_lngToken As Long
    Dim p_lngBufferLen As Long
    Dim p_typLUID As LUID
    Dim p_typTokenPriv As TOKEN_PRIVILEGES
    Dim p_typPrevTokenPriv As TOKEN_PRIVILEGES
    p_lngRtn = OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY, p_lngToken)
    If p_lngRtn = 0 Then
        Exit Function
    ElseIf Err.MaxDllError <> 0 Then
        Exit Function
    End If
    p_lngRtn = LookupPrivilegeValue(0&, seName, p_typLUID)
    If p_lngRtn = 0 Then
        Exit Function
    End If
    p_typTokenPriv.PrivilegeCount = 1
    p_typTokenPriv.Privileges.Attributes = SE_PRIVILEGE_ENABLED
    p_typTokenPriv.Privileges.pLuid = p_typLUID
    EnablePrivilege = (AdjustTokenPrivileges(p_lngToken, False, p_typTokenPriv, Len(p_typPrevTokenPriv), p_typPrevTokenPriv, p_lngBufferLen) <> 0)
End Function
Public Function RestoreKey(ByVal sKeyName As String, ByVal sFileName As String, lPredefinedKey As Long) As Boolean
    If EnablePrivilege(SE_RESTORE_NAME) = False Then Exit Function
    Dim hKey As Long, lRetVal As Long
    Call RegOpenKeyEx(lPredefinedKey, sKeyName, 0&, KEY_ALL_ACCESS, hKey)
    Call RegRestoreKey(hKey, sFileName, REG_FORCE_RESTORE)
    RegCloseKey hKey
End Function
Public Function SaveKey(ByVal sKeyName As String, ByVal sFileName As String, lPredefinedKey As Long) As Boolean
    If EnablePrivilege(SE_BACKUP_NAME) = False Then Exit Function
    Dim hKey As Long, lRetVal As Long
    Call RegOpenKeyEx(lPredefinedKey, sKeyName, 0&, KEY_ALL_ACCESS, hKey)
    If Dir(sFileName) <> "" Then Kill sFileName
    Call RegSaveKey(hKey, sFileName, ByVal 0&)
    RegCloseKey hKey
End Function

Private Sub Command1_Click()
    sFile = App.Path & "     est.reg"
    SaveKey "SOFTWAREMicrosoftWindowsCurrentVersionRun", sFile, HKEY_LOCAL_MACHINE
End Sub

Private Sub Command2_Click()
    sFile = App.Path & "     est.reg"
    RestoreKey "SOFTWAREMicrosoftWindowsCurrentVersionRun", sFile, HKEY_LOCAL_MACHINE
    If sFile <> Error Then Kill sFile
End Sub

Private Sub Form_Load()
    Command1.Caption = "Salvar chave"
    Command2.Caption = "Restaurar chave"
End Sub


'Josefh Hennyere
 


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