(mymssql_db is a private memeber of the class and its type is MSSQLSession).

bool OpenMSSqlDB(){

	String username = "sa";
	String pwd = "mypassword";
	String dbname = "MYDBNAME";
	String server = "servername\\instancename";
	String cs = "Driver={SQL Server};Server=" + server +
					";UID=" + username + ";PWD=" + pwd + ";Database=" + dbname + ";";
	if(!mymssql_db.Connect(cs))
	{
		string err="Unable to connect to MSSql database due to the following error: " + mymssql_db.GetLastError().ToStd();
		this->err_messages->push_back(err);
		return false;
	}

	mymssql_db.ThrowOnError();
	mymssql_db.LogErrors();
	mymssql_db.SetTrace();

	return true;
}