Please help :: 'SqlConnection' : undeclared identifier :: how can I use it in VC++ 2005? is there any way ?

String* myConnectString = "Data Source=stopsqldkcph101.apmoller.net;Initial Catalog=MDSDashboard;User Id=uuuuuuu;Password=ppppppp";
                    SqlConnection* myConnection = new SqlConnection(myConnectString);
                    myConnection->Open();