说明：  用vb编写的对access数据库进行压缩和修复。编程时对数据库增、删、改等操作后，会使数据库文件变大，使用这个代码可以很容易的使空间变小，很实用。
(With vb prepared by the compact and repair access database. When programming the database to add, delete, change or other operation, the database file will become larger, the use of this code can easily make the space smaller, very practical.)