C#：自定义全局热键

hotkey.csusing System; using System.Runtime.InteropServices; using System.Windows.Forms; public partial class Form1 : Form { // 1. 声明 API [DllImport(user32.dll, SetLastError true)] private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk); [DllImport(user32.dll, SetLastError true)] private static extern bool UnregisterHotKey(IntPtr hWnd, int id); // 常量定义 private const int WM_HOTKEY 0x0312; private const uint MOD_CONTROL 0x0002; private const uint MOD_ALT 0x0001; private const uint MOD_SHIFT 0x0004; private const uint MOD_WIN 0x0008; private const uint MOD_NOREPEAT 0x4000; // 防止长按重复触发 private const int HOTKEY_ID 100; // 热键唯一ID public Form1() { // 注意不要在构造函数里注册等窗体句柄创建完成后再注册 this.Load Form1_Load; this.FormClosed Form1_FormClosed; } private void Form1_Load(object sender, EventArgs e) { // 2. 注册热键Ctrl Alt F12 bool success RegisterHotKey(this.Handle, HOTKEY_ID, MOD_CONTROL | MOD_ALT | MOD_NOREPEAT, 0x7B); // 0x7B F12 if (!success) { MessageBox.Show(热键注册失败可能已被其他程序占用。); } } // 3. 重写 WndProc 捕获热键消息 protected override void WndProc(ref Message m) { base.WndProc(ref m); // 必须调用基类 if (m.Msg WM_HOTKEY m.WParam.ToInt32() HOTKEY_ID) { // 在这里写你的业务逻辑建议用 BeginInvoke 异步处理避免阻塞 UI this.BeginInvoke((MethodInvoker)delegate { // 比如呼出窗口、显示通知等 this.Show(); this.WindowState FormWindowState.Normal; this.Activate(); }); } } // 4. 退出时注销热键 private void Form1_FormClosed(object sender, FormClosedEventArgs e) { UnregisterHotKey(this.Handle, HOTKEY_ID); } } static class Program { static void Main() { Application.Run(new Form1()); } }编译C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc /target:winexe /out:hotkey.exe hotkey.cs运行hotkey效果Ctrl Alt F12 显示窗口