数据库连接，读，写，修改，储存，等等的函数！可以镶入任何的程序，这样编写数据库就节省了很多时间了！-Database connection, read, write, modify, store, and so the function! Can insert into any of the procedures, so that the preparation of database on save a lot of time!

利用VC实现Excel文件的读写，利用了CDatabase类操作-To read and write Excel files using VC to achieve

利用SQL Server 数据库，实现数据库的读写功能-realize the function of the database read and write using SQL Server