检测U盘是否插入。通过截获消息同时获取驱动器列表就可以看到插入和拔出的驱动器设备-Detect whether the inserted U disk. Intercepted messages to get through the list of drives at the same time you can see the plug and unplug the drive device

在电脑PC上实现U盘的插入和拔出检测，同时还可获取电脑上的逻辑硬盘分区-On the computer PC achieve insertion and removal detection U disk, but can also get the logical disk partitions on the computer