狐的窩

備份一下，不然每次要設定都要找半天
For Standard security:
connectStr = _T("Provider=sqloledb;Data Source=MyServerName;Initial Catalog=MyDatabaseName;User Id=MyUsername;Password=MyPassword;");

For Trusted Connection security (Microsoft Windows NT integrated security):
connectStr = _T("Provider=sqloledb;Data Source=MyServerName;Initial Catalog=MyDatabaseName;Integrated Security=SSPI;");

If you want to connect to a "Named Instance" (SQL Server 2000), you must to specify Data Source=Servere Name\Instance Name like in the following example:
connectStr = _T("Provider=sqloledb;Data Source=MyServerName\MyInstanceName;Initial Catalog=MyDatabaseName;User Id=MyUsername;Password=MyPassword;");

If you want to connect with a SQL Server running on the same computer, you must specify the keyword (local) in the Data Source like in the following example:
connectStr = _T("Provider=sqloledb;Data Source=(local);Initial Catalog=myDatabaseName;User ID=myUsername;Password=myPassword;");

To connect to SQL Server running on a remote computer (via an IP address):
connectStr = _T("Provider=sqloledb;Network Library=DBMSSOCN;Data Source=10.200.3.18,1433;Initial Catalog=MyDatabaseName;User ID=MyUsername;Password=MyPassword;");