1.导入dll

        [System.Runtime.InteropServices.DllImport("user32.dll")] //申明API函数public static extern bool RegisterHotKey(IntPtr hWnd, // handle to windowint id, // hot key identifieruint fsModifiers, // key-modifier optionsKeys vk // virtual-key code);[System.Runtime.InteropServices.DllImport("user32.dll")] //申明API函数public static extern bool UnregisterHotKey(IntPtr hWnd, // handle to windowint id // hot key identifier);

2.定义hotkey

RegisterHotKey(Handle, 100, 0, Keys.Home); //注册热键为home//关闭程序前，需要卸载热键
UnregisterHotKey(Handle, 100);//卸载快捷键

 

3.重载WndProc函数

 protected override void WndProc(ref Message m) // 重载WndProc函数{const int WM_HOTKEY = 0x0312; //判断hotkey标志try{if (m.Msg != WM_HOTKEY || m.WParam.ToInt32() != 100){goto EndFunction;}//获取当前窗口信息IntPtr hWnd = GetForegroundWindow();uint procId = 0;GetWindowThreadProcessId(hWnd, out procId);var proc = Process.GetProcessById((int)procId);string titleName = proc.MainWindowTitle;     int fileLen = titleName.LastIndexOf('-');string fileFullPath = titleName.Substring(0,fileLen).Trim();this.textBoxFileNme.Text = fileFullPath;//执行函数......}catch (Exception ex){this.textBoxLog.AppendText("Error!!!"+ex.Message);}EndFunction:base.WndProc(ref m);}