u盘监听程序源码

//访问非托管的类
using System.Runtime.InteropServices;
//来查询是否有光盘和读取卷标之类的东西
using System.IO;


[StructLayout(LayoutKind.Sequential)]
        public struct DEV_BROADCAST_VOLUME
        {
            public int dbcv_size;
            public int dbcv_devicetype;
            public int dbcv_reserved;
            public int dbcv_unitmask;
        }

        protected override void WndProc(ref Message m)
        {
            // 发生设备变动
            const int WM_DEVICECHANGE = 0x0219;
            // 系统检测到一个新设备
            const int DBT_DEVICEARRIVAL = 0x8000;
            // 系统完成移除一个设备
            const int DBT_DEVICEREMOVECOMPLETE = 0x8001;
            // 逻辑卷标
            const int DBT_DEVTYP_VOLUME = 0x00000002;

            switch (m.Msg)
            {
                case WM_DEVICECHANGE:
                    switch (m.WParam.ToInt32())