充分利用了ADODC的功能，利用工程部件中的ADODC，他的作用和data控件的相同，但他更高级，比前者更方便。而且，他比ADO对象编程更直观，更简洁易懂-ADODC full advantage of the functions of engineering components used in the ADODC, his role and control of the same data, but more advanced, more convenient than the former