C#的usb通讯编程.doc

C#的usb通讯编程using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.IO;namespace U盘更新public partial class Form1 : Formpublicconstint WM_DEVICECHANGE = 0x219;publicconstint DBT_DEVICEARRIVAL = 0x8000;publicconstint DBT_CONFIGCHANGECANCELED = 0x0019;publicconstint DBT_CONFIGCHANGED = 0x0018;publicconstint DBT_CUSTOMEVENT = 0x8006;publicconstint DBT_DEVICEQUERYREMOVE = 0x8001;publicconstint DBT_DEVICEQUERYREMOVEFAILED = 0x8002;publicconstint DBT_DEVICEREMOVECOMPLETE = 0x8004;publicconstint DBT_DEVICEREMOVEPENDING = 0x8003;publicconstint DBT_DEVICETYPESPECIFIC = 0x8005;publicconstint DBT_DEVNODES_CHANGED = 0x0007;publicconstint DBT_QUERYCHANGECONFIG = 0x0017;publicconstint DBT_USERDEFINED = 0xFFFF;public Form1()InitializeComponent();privatevoid Form1_Load(object sender, EventArgs e)protectedoverridevoid WndProc(ref Message m)tryif (m.Msg = WM_DEVICECHANGE)switch (m.WParam.ToInt32()case WM_DEVICECHANGE:break;case DBT_DEVICEARRIVAL:/U盘插入DriveInfo s = DriveInfo.GetDrives();foreach (DriveInfo drive in s)if (drive.DriveType = DriveType.Removable)listBox1.Items.Add(U盘已插入，盘符为: + drive.Name.ToString();break;break;case DBT_CONFIGCHANGECANCELED:break;case DBT_CONFIGCHANGED:break;case DBT_CUSTOMEVENT:break;case DBT_DEVICEQUERYREMOVE:break;case DBT_DEVICEQUERYREMOVEFAILED:break;case DBT_DEVICEREMOVECOMPLETE: /U盘卸载break;case DBT_DEVICEREMOVEPENDING:break;case DBT_DEVICETYPESPECIFIC:break;case DBT_DEVNODES_CHANGED:break;case DBT_QUERYCHANGECONFIG:break;case DBT_USERDEFINED:brea