Sql Native Client -

Driver=SQL Server Native Client 11.0;Server=myServer\instance;Database=myDB;Trusted_Connection=yes;

SQLHENV env; SQLHDBC dbc; SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &env); SQLSetEnvAttr(env, SQL_ATTR_ODBC_VERSION, (SQLPOINTER)SQL_OV_ODBC3, 0); SQLAllocHandle(SQL_HANDLE_DBC, env, &dbc); SQLDriverConnect(dbc, NULL, (SQLCHAR*)"Driver=SQL Server Native Client 11.0;Server=localhost;Database=test;Trusted_Connection=yes;", SQL_NTS, NULL, 0, NULL, SQL_DRIVER_COMPLETE); sql native client

Note: .NET developers today should use (not SNAC). Driver=SQL Server Native Client 11