可以自动检测优盘的插入，并自动复制指定类型的文件到指定的文件目录。代码简单易懂。非常适合新手学习-USB can automatically detect the insertion and automatically copy specified file to the specified type of file directory. Is straightforward. For new users to learn

自己写的一个U盘自动复制文件程序，能够在Usb插入时自动复制指定的文件，主要是WM_DEVICECHANGE消息的运用-U disk to write a program automatically copies the file can be automatically inserted in the Usb copy the specified file, use the main message is WM_DEVICECHANGE

可把优盘的文件自动复制到电脑 把电脑的文件复制到优盘-copy file in usb disk of to computer or copy file in computer to usb disk