C#winform全局热键

winform监听快捷键

// Windows API 函数声明
		[DllImport("user32.dll")]
		public static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);

		[DllImport("user32.dll")]
		public static extern bool UnregisterHotKey(IntPtr hWnd, int id);

		// 定义热键的标识符
		const int HOTKEY_ID = 1;

		// Modifier 键标识符
		const uint MOD_ALT = 0x0001;
		const uint MOD_CONTROL = 0x0002;
		const uint MOD_SHIFT = 0x0004;
		const uint MOD_WIN = 0x0008;
		private void RegisterGlobalHotKeys()
		{
			// 注册 Ctrl + Alt + S 为全局热键
			if (!RegisterHotKey(this.Handle, HOTKEY_ID, MOD_CONTROL | MOD_ALT, (uint)Keys.D))
			{
				MessageBox.Show("无法注册热键！");
			}
		}
		// 窗体的消息处理
		protected override void WndProc(ref Message m)
		{
			const int WM_HOTKEY = 0x0312;

			// 如果是热键消息
			if (m.Msg == WM_HOTKEY)
			{
				// 判断热键 ID 是否匹配
				if (m.WParam.ToInt32() == HOTKEY_ID)
				{
					//MessageBox.Show("Ctrl + Alt + a 被按下！");
					// 获取整个屏幕截图
					Bitmap screenshot = CaptureScreen();

					// 识别二维码
					string qrCodeData = DecodeQRCode(screenshot);

					if (!string.IsNullOrEmpty(qrCodeData))
					{
						//MessageBox.Show("识别到二维码链接: " + qrCodeData);
						// 将二维码链接复制到剪贴板
						Clipboard.SetText(qrCodeData);
						new FadeMessageForm("二维码链接已复制到剪贴板").Show();
						//var url = "http://" + label6.Text;
						Process.Start(qrCodeData);
					}
					else
					{
						//MessageBox.Show("没有识别到二维码。");
						new FadeMessageForm("没有识别到二维码").Show();
					}
				}
			}

			base.WndProc(ref m);
		}

		// 在关闭窗体时注销热键
		protected override void OnFormClosing(FormClosingEventArgs e)
		{
			UnregisterHotKey(this.Handle, HOTKEY_ID);
			base.OnFormClosing(e);
		} 
		public Form1()
		{
			this.InitializeComponent();
			// 注册全局热键
			RegisterGlobalHotKeys();