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ODBC Driver for dBASE
strConnection = _T("Driver={Microsoft dBASE Driver (*.dbf)};DriverID=277;"
                   "Dbq=c:\\DatabasePath;");

ODBC Driver for Excel
strConnection = _T("Driver={Microsoft Excel Driver (*.xls)};DriverId=790;"
    bq=C:\\DatabasePath\\DBSpreadSheet.xls;DefaultDir=c:\\databasepath;");

ODBC Driver for Text
strConnection = _T("Driver={Microsoft Text Driver (*.txt; *.csv)};"
        "Dbq=C:\\DatabasePath\\;Extensions=asc,csv,tab,txt;");

ODBC Driver for Visual FoxPro
strConnection = _T("Driver={Microsoft Visual Foxpro Driver};UID=;"
    "SourceType=DBF;SourceDB=C:\\DatabasePath\\MyDatabase.dbc;Exclusive=No");

ODBC Driver for Access
strConnection = _T("Driver={Microsoft Access Driver (*.mdb)};"
        "Dbq=c:\\DatabasePath\\dbaccess.mdb;Uid=;Pwd=;");

ODBC Driver for SQL Server
For Standard security:

strConnection = _T("Driver={SQL Server};Server=MyServerName;"
        "Trusted_Connection=no;"
        "Database=MyDatabaseName;Uid=MyUserName;Pwd=MyPassword;");

For Trusted Connection security (Microsoft Windows NT integrated security):

strConnection = _T("Driver={SQL Server};Server=MyServerName;"
     "Database=myDatabaseName;Uid=;Pwd=;");

ODBC Driver for Oracle
For the current Oracle ODBC driver from Microsoft:

strConnect = _T("Driver={Microsoft ODBC for Oracle};Server=OracleServer.world;"
        "Uid=MyUsername;Pwd=MyPassword;");

For the older Oracle ODBC driver from Microsoft:

strConnect = _T("Driver={Microsoft ODBC Driver for Oracle};"
     "ConnectString=OracleServer.world;Uid=myUsername;Pwd=myPassword;");

ODBC Driver for MySQL
If you want to connect to a local database, you can use a connection string like the following:

strConnect = _T("Driver={MySQL ODBC 3.51 Driver};Server=localhost;"
     "Database=MyDatabase;User=MyUserName;Password=MyPassword;Option=4;");

ODBC Driver for AS400
strConnect = _T("Driver={Client Access ODBC Driver (32-bit)};System=myAS400;"
      "Uid=myUsername;Pwd=myPassword;");

ODBC Driver for SyBase
strConnect = _T("Driver={Sybase System 10};Srvr=MyServerName;Uid=MyUsername;"
       "Pwd=myPassword;");

ODBC Driver for Sybase SQL AnyWhere
strConnect = _T("ODBC;Driver=Sybase SQL Anywhere 5.0;"
    "DefaultDir=C:\\DatabasePath\;Dbf=C:\\SqlAnyWhere50\\MyDatabase.db;"
    "Uid=MyUsername;Pwd=MyPassword;Dsn=\"\";");

=================以下是OLE DB====================
FOR
{
SQL
MySQL
AS400
AD
DB2
Microsoft Jet
OLAP
Oracle
FoxPro
Index Server
}
OLE DB Provider for SQL Server
For Standard security:

strConnect = _T("Provider=sqloledb;Data Source=MyServerName;"
        "Initial Catalog=MyDatabaseName;"
        "User Id=MyUsername;Password=MyPassword;");

For Trusted Connection security (Microsoft Windows NT integrated security):

strConnect = _T("Provider=sqloledb;Data Source=MyServerName;"
        "Initial Catalog=MyDatabaseName;"
        "Integrated Security=SSPI;");

OLE DB Provider for MySQL
strConnection = _T("Provider=MySQLProv;Data Source=test");

OLE DB Provider for AS400
strConnect = _T("Provider=IBMDA400;Data source=myAS400;User Id=myUsername;"
     "Password=myPassword;");

OLE DB Provider for Active Directory
strConnect = _T("Provider=ADSDSOObject;User Id=myUsername;Password=myPassword;");

OLE DB Provider for DB2
If you are using a TCP/IP connection:

strConnect = _T("Provider=DB2OLEDB;Network Transport Library=TCPIP;"
        "Network Address=130.120.110.001;"
        "Initial Catalog=MyCatalog;Package Collection=MyPackageCollection;"
        "Default Schema=MySchema;User ID=MyUsername;Password=MyPassword;");

If you are using APPC connection:

strConnect = _T("Provider=DB2OLEDB;APPC Local LU Alias=MyLocalLUAlias;"
        "APPC Remote LU Alias=MyRemoteLUAlias;Initial Catalog=MyCatalog;"
        "Package Collection=MyPackageCollection;Default Schema=MySchema;"
        "User ID=MyUsername;Password=MyPassword;");

OLE DB Provider for Microsoft Jet
Connecting to an Access file using the JET OLE DB Provider:
Using Standard security:

strConnect = _T("Provider=Microsoft.Jet.OLEDB.4.0;"
        "Data Source=C:\\DatabasePath\\MmDatabase.mdb;"
        "User Id=admin;Password=;");

Connecting to an Excel Spreadsheet using the JET OLE DB Provider: strConnect = _T("Provider=Microsoft.Jet.OLEDB.4.0;"
        "Data Source=C:\\DatabasePath\\DBSpreadSheet.xls;"
        "Extended Properties=\"\"Excel 8.0;HDR=Yes;\"\";");

Connecting to an Outlook 2000 personal mail box using the JET OLE DB Provider: (By J. Cardinal) strConnect = _T("Provider=Microsoft.Jet.OLEDB.4.0;Outlook 9.0;"
      "MAPILEVEL=;DATABASE=C:\\Temp\\;")

Connecting to an Exchange mail box through JET: (By J. Cardinal) strConnect = _T("Provider=Microsoft.Jet.OLEDB.4.0;Exchange 4.0;"
      "MAPILEVEL=Mailbox - Pat Smith|;DATABASE=C:\\Temp\\;")

OLE DB Provider for ODBC Databases
If you want to connect with a Microsoft Access database:

strConnect = _T("Provider=MSDASQL;Driver={Microsoft Access Driver (*.mdb)};"
        "Dbq=c:\\DatabasePath\\MyDatabase.mdb;Uid=MyUsername;Pwd=MyPassword;");

If you want to connect with a SQL Server database:

strConnect = _T("Provider=MSDASQL;Driver={SQL Server};Server=MyServerName;"
        "Database=MyDatabaseName;Uid=MyUsername;Pwd=MyPassword;");

If you want to use DSN:

strConnect = _T("Provider=MSDASQL;PersistSecurityInfo=False;"
        "Trusted_Connection=Yes;"
        "Data Source=MyDSN;catalog=MyDatabase;");

OLE DB Provider for OLAP
MicrosoftR OLE DB for Online Analytical Processing (OLAP) is a set of objects and interfaces that extends the ability of OLE DB to provide access to multidimensional data stores.

strConnect = _T("Provider=MSOLAP;Data Source=MyOLAPServerName;"
     "Initial Catalog=MyOLAPDatabaseName;");

Using a URL
strConnect = _T("Provider=MSOLAP;Data Source=http://MyOLAPServerName/;"
     "Initial Catalog=MyOLAPDatabaseName;");

Using SSL
strConnect = _T("Provider=MSOLAP;Data Source=https://MyOLAPServerName/;"
     "Initial Catalog=MyOLAPDatabaseName;");

OLE DB Provider for Oracle (from Microsoft)
strConnect = _T("Provider=MSDAORA;Data Source=MyOracleDB;User Id=myUsername;"
     "Password=myPassword;");

For Standard security:

strConnect = _T("Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;"
        "User Id=myUsername;Password=myPassword;");

strConnect = _T("Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;"
   "User Id=/;Password=;");

OLE DB Provider for Visual FoxPro
strConnect = _T("Provider=vfpoledb;"
     "Data Source=C:\\DatabasePath\\MyDatabase.dbc;");

OLE DB Provider for Index Server
strConnect = _T("provider=msidxs;Data Source=MyCatalog;");