vc用oo4o怎么与oracle数据库相连接？

Question

OLE DB Provider for Oracle (from Microsoft) 
oConn.Open "Provider=msdaora;" & _
           "Data Source=MyOracleDB;" & _ 
           "User Id=myUsername;" & _
           "Password=myPassword"
OLE DB Provider for Oracle (from Oracle) 
For Standard SecurityoConn.Open "Provider=OraOLEDB.Oracle;" & _
           "Data Source=MyOracleDB;" & _ 
           "User Id=myUsername;" & _
           "Password=myPassword"
 
For a Trusted ConnectionoConn.Open "Provider=OraOLEDB.Oracle;" & _
           "Data Source=MyOracleDB;" & _ 
           "User Id=/;" & _
           "Password="
' Or
oConn.Open "Provider=OraOLEDB.Oracle;" & _
           "Data Source=MyOracleDB;" & _ 
           "OSAuthent=1"