在Carlos Antollini编写的ado封装类2.20版本上修改，使其支持UNICODE。这个封装类很不错，几乎把所有的Ado操作都封装了。Ado2主要提供了CADOCommand，CADODatabase，CADOException，CADOFieldInfo，CADOParameter，CADORecordset，CJetEngine七个类接口，其中最常用的就是CADODatabase和CADORecordset-Written in Carlos Antollini, ado wrapper class 2.20 version modified to support UNICODE. This wrapper class is very good, almost all operations are encapsulated Ado. The Ado2 main CADOCommand, CADODatabase, CADOException, CADOFieldInfo, CADOParameter, CADORecordset, CJetEngine seven class interface, which is most commonly used, is CADODatabase and CADORecordset