我想要检测usb插入事件。我尝试重载wndproc()
以获取我的消息。但是我遇到了Windows消息的错误。
错误信息为:
The name 'WM_DEVICECHANGE' does not exist in the current context
The name 'DBT_DEVICEARRIVAL' does not exist in the current context
此外,这是我尝试过的代码。
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.IO;
using Microsoft.Win32.SafeHandles;
namespace USBCheckerApp
{
public partial class Form1 : Form
{
bool bDeviceFound = false;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
if (!bDeviceFound)
{
button1.Enabled = false;
}
}
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case WM_DEVICECHANGE:
if (m.WParam == DBT_DEVICEARRIVAL)
{
MessageBox.Show("MEDIA FOUND");
}
}
}
}
}
添加此功能是为了让您可以提出任何更新建议。 谢谢。