Como criar programaticamente um DSN para SQL Server com VB

Voltar para o início

Procedimentos passo a passo

1. Abra um novo projeto Visual Basic. O Form1 é criado por padrão. Coloque um CommandButton no Form1 (Command1) e coloque o código a seguir na seção Declaração geral do código de Form1:

       Option Explicit
   
       Private Const REG_SZ = 1    'Constant for a string variable type.
       Private Const HKEY_LOCAL_MACHINE = &H80000002
   
       Private Declare Function RegCreateKey Lib "advapi32.dll" Alias _
          "RegCreateKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, _
          phkResult As Long) As Long
   
       Private Declare Function RegSetValueEx Lib "advapi32.dll" Alias _
          "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, _
          ByVal Reserved As Long, ByVal dwType As Long, lpData As Any, ByVal _
          cbData As Long) As Long
   
       Private Declare Function RegCloseKey Lib "advapi32.dll" _
          (ByVal hKey As Long) As Long
   						

2. Coloque o seguinte código no evento click do botão Command1 no Form1:
   
   Altere os valores das variáveis DataSourceName, DatabaseName, Description, DriverPath, LastUser e Server conforme apropriado para seu ambiente. Qualquer um dos drivers listados na guia drivers ODBC da janela ODBC Data Source Administrator pode ser usado como parte da variável DriverPath. Todos esses drivers podem ser encontrados em máquinas C:\Windows\System para Windows 95 ou Windows 98 e C:\Winnt\System32 para Windows NT.

      Private Sub Command1_Click()
   
      Dim DataSourceName As String
      Dim DatabaseName As String
      Dim Description As String
      Dim DriverPath As String
      Dim DriverName As String
      Dim LastUser As String
      Dim Regional As String
      Dim Server As String
   
      Dim lResult As Long
      Dim hKeyHandle As Long
   
      'Specify the DSN parameters.
   
      DataSourceName = "<the name of your new DSN>"
      DatabaseName = "<name of the database to be accessed by the new DSN>"
      Description = "<a description of the new DSN>"
      DriverPath = "<path to your SQL Server driver>"
      LastUser = "<default user ID of the new DSN>"
      Server = "<name of the server to be accessed by the new DSN>"
      DriverName = "SQL Server"
   
      'Create the new DSN key.
   
      lResult = RegCreateKey(HKEY_LOCAL_MACHINE, "SOFTWARE\ODBC\ODBC.INI\" & _
           DataSourceName, hKeyHandle)
   
      'Set the values of the new DSN key.
   
      lResult = RegSetValueEx(hKeyHandle, "Database", 0&, REG_SZ, _
         ByVal DatabaseName, Len(DatabaseName))
      lResult = RegSetValueEx(hKeyHandle, "Description", 0&, REG_SZ, _
         ByVal Description, Len(Description))
      lResult = RegSetValueEx(hKeyHandle, "Driver", 0&, REG_SZ, _
         ByVal DriverPath, Len(DriverPath))
      lResult = RegSetValueEx(hKeyHandle, "LastUser", 0&, REG_SZ, _
         ByVal LastUser, Len(LastUser))
      lResult = RegSetValueEx(hKeyHandle, "Server", 0&, REG_SZ, _
         ByVal Server, Len(Server))
   
      'Close the new DSN key.
   
      lResult = RegCloseKey(hKeyHandle)
   
      'Open ODBC Data Sources key to list the new DSN in the ODBC Manager.
      'Specify the new value.
      'Close the key.
   
      lResult = RegCreateKey(HKEY_LOCAL_MACHINE, _
         "SOFTWARE\ODBC\ODBC.INI\ODBC Data Sources", hKeyHandle)
      lResult = RegSetValueEx(hKeyHandle, DataSourceName, 0&, REG_SZ, _
         ByVal DriverName, Len(DriverName))
      lResult = RegCloseKey(hKeyHandle)
   
      End Sub
   						

3. Execute o projeto e clique no botão de comando Command1. Em seguida, abra o administrador de fonte de dados ODBC do painel de controle (ou ferramentas de administrador no Windows 2000). O novo DSN aparecerá junto com os outros DSNs do sistema que você já criou.

Voltar para o início