在unity中实现隐藏窗口，显示系统托盘图标，右键菜单退出功能

需要导入Targets .NET 3.5的System.Windows.Forms

using UnityEngine;
using System.Windows.Forms;
using System.Drawing;
using System.Runtime.InteropServices;

public class SystemTrayIcon : MonoBehaviour
{
    private NotifyIcon notifyIcon;
    private ContextMenuStrip contextMenu;

    // 引入 Windows API 函数
    [DllImport("user32.dll")]
    private static extern bool ShowWindow(System.IntPtr hWnd, int nCmdShow);
    [DllImport("user32.dll")]
    private static extern System.IntPtr GetActiveWindow();
    [DllImport("user32.dll")]
    private static extern bool SetForegroundWindow(System.IntPtr hWnd);

    private const int SW_HIDE = 0;

    void Awake()
    {
        // 隐藏窗口
        System.IntPtr hWnd = GetActiveWindow();
        ShowWindow(hWnd, SW_HIDE);

        // 创建上下文菜单
        contextMenu = new ContextMenuStrip();
        ToolStripMenuItem exitMenuItem = new ToolStripMenuItem("退出");
        exitMenuItem.Click += ExitMenuItem_Click;
        contextMenu.Items.Add(exitMenuItem);

        // 创建系统托盘图标
        notifyIcon = new NotifyIcon();
        notifyIcon.Icon = new Icon(UnityEngine.Application.streamingAssetsPath + "/icon.ico"); // 替换为你的图标路径
        notifyIcon.Text = "Unity 系统托盘图标";
        notifyIcon.ContextMenuStrip = contextMenu;
        notifyIcon.Visible = true;
        notifyIcon.MouseDoubleClick += NotifyIcon_MouseDoubleClick;
    }

    private void NotifyIcon_MouseDoubleClick(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            // 双击图标时将 Unity 窗口置于前台
            System.IntPtr hWnd = GetActiveWindow();
            SetForegroundWindow(hWnd);
        }
    }

    private void ExitMenuItem_Click(object sender, System.EventArgs e)
    {
        // 退出应用程序
        notifyIcon.Visible = false;
        notifyIcon.Dispose();
        UnityEngine.Application.Quit();
    }

    void OnApplicationQuit()
    {
        // 在应用程序退出时释放资源
        if (notifyIcon != null)
        {
            notifyIcon.Visible = false;
            notifyIcon.Dispose();
        }
    }
}