C# 监控U盘插入与拔出

1. 方法一:
2. using System; 
3. using System.Collections.Generic; 
4. using System.ComponentModel; 
5. using System.Data; 
6. using System.Drawing; 
7. using System.Text; 
8. using System.Windows.Forms; 
9. using System.Runtime.InteropServices; 
10.  
11. namespace upan 
12. { 
13.     public partial class Form1 : Form 
14.     { 
15.         public Form1() 
16.         { 
17.             InitializeComponent(); 
18.         } 
19.         public Message mm; 
20.         protected override void WndProc(ref Message m) //监视Windows消息 
21.         { 
22.             const int WM_DEVICECHANGE = 0x219; 
23.             const int WM_DEVICEARRVIAL = 0x8000;//如果m.Msg的值为0x8000那么表示有U盘插入 
24.             const int WM_DEVICEMOVECOMPLETE = 0x8004; 
25.             switch (m.Msg) 
26.             { 
27.                 case WM_DEVICECHANGE: 
28.                     { 
29.                         ShowDeviceChanged("WM_DEVICECHANGE"); 
30.                         if (m.WParam.ToInt32() == WM_DEVICEARRVIAL) 
31.                             ShowDeviceChanged("WM_DEVICEARRVIAL"); 
32.                         else if (m.WParam.ToInt32() == WM_DEVICEMOVECOMPLETE) 
33.                             ShowDeviceChanged("WM_DEVICEMOVECOMPLETE"); 
34.                     } 
35.                     break; 
36.             } 
37.             base.WndProc(ref m); //将系统消息传递自父类的WndProc 
38.  
39.         } 
40.         public void ShowDeviceChanged(string message) 
41.         { 
42.             switch (message) 
43.             { 
44.                 case "WM_DEVICECHANGE": 
45.                     this.textBox_Message.Text += "Device Changed \r\n"; 
46.                     break; 
47.                 case "WM_DEVICEMOVECOMPLETE": 
48.                     this.textBox_Message.Text += "Device Moved\r\n"; 
49.                     break; 
50.                 case "WM_DEVICEARRVIAL": 
51.                     this.textBox_Message.Text += "Device Arrived\r\n"; 
52.                     break; 
53.             } 
54.         } 
55.  
56.         private void Form1_Load(object sender, EventArgs e) 
57.         { 
58.             WndProc(ref mm); 
59.         } 
60.     } 
61. }