This article was previously published under Q238949
SQL Server allows you to choose from a number of different network libraries that you can use when connecting. You can configure these network libraries when you create a data source name (DSN) for your data source. However, an alternative way to specify the DSN is to pass in the network library, which you want to use, with the connection string. This article describes how to specify the network library that you want to use for connecting to SQL Server when connecting from a Visual Basic application that uses ActiveX Data Objects (ADO).
SQL Server allows you to use the following network libraries when establishing a connection. They are:
dbnmpntw - Win32 Named Pipes
dbmssocn - Win32 Winsock TCP/IP
dbmsspxn - Win32 SPX/IPX
dbmsvinn - Win32 Banyan Vines
dbmsrpcn - Win32 Multi-Protocol (Windows RPC)
When connecting to SQL Server through ADO the NETWORK parameter in the connection string can be used to specify which of these libraries to use when connecting to the database. The NETWORK parameter is the name of the Net-Library module to use, without the .dll suffix (for example, Dbmssocn, not Dbmssocn.dll). Here are some examples of connection strings that specify this parameter:
Note Make sure that User ID has the appropriate permissions to perform this operation on the database.