Se for DSN e se for para SQLServer:
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
Private Sub Cria_DSN()
Dim DataSourceName As String
Dim DatabaseName As String
Dim Description As String
Dim DriverPath As String
Dim DriverName As String
Dim MaxUser As String
Dim Regional As String
Dim Server As String
Dim lResult As Long
Dim hKeyHandle As Long
'Specify the DSN parameters.
DataSourceName = "InfoAdministrativo"
DatabaseName = "Administrativo"
Description = "Orçamento/Compras/Contabilidade"
DriverPath = "C:WindowsSystem32"
MaxUser = "Infoadministrativo"
Server = 192.0.8.8 'Ip do Servidor
DriverName = "SQL Server"
'Create the new DSN key.
lResult = RegCreateKey(HKEY_LOCAL_MACHINE, "SOFTWAREODBCODBC.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, "MaxUser", 0&, REG_SZ, _
ByVal MaxUser, Len(MaxUser))
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, _
"SOFTWAREODBCODBC.INIODBC Data Sources", hKeyHandle)
lResult = RegSetValueEx(hKeyHandle, DataSourceName, 0&, REG_SZ, _
ByVal DriverName, Len(DriverName))
lResult = RegCloseKey(hKeyHandle)
End Sub