Unity | 트레이에 창을 숨기고 작업 표시줄에 icon을 표시하지 않음

using System;
using System.Runtime.InteropServices;
using UnityEngine;
using UnityEngine.UI;

public class LayoutManager : MonoBehaviour
{
    [DllImport("user32.dll")]
    static extern IntPtr GetForegroundWindow();

    [DllImport("user32.dll")]
    public static extern bool ShowWindow(IntPtr hwnd, int nCmdShow);

    private const int SW_HIDE = 0;  //hied task bar

    private const int SW_RESTORE = 9;//show task bar
    
    private static System.Windows.Forms.NotifyIcon _notifyIcon = new System.Windows.Forms.NotifyIcon();

    private static int _width = 100, _height = 100;

    public Button btn;

    private IntPtr window;
   
    private void Start()
    {
        btn.onClick.AddListener(delegate
        {
            HideTaskBar();
        });
    }
    
    public void HideTaskBar()//      
    {
        try
        {
            window = GetForegroundWindow();

            ShowWindow(window, SW_HIDE);

            _notifyIcon.BalloonTipText = "AIScanner1.1.0";//        

            _notifyIcon.Text = "AIScanner";//          

            _notifyIcon.Visible = true;//        

            _notifyIcon.Icon = CustomTrayIcon(Application.streamingAssetsPath + "/icon.png", _width, _height);//    

            _notifyIcon.ShowBalloonTip(2000);//        

            _notifyIcon.MouseClick += notifyIcon_MouseClick;//          
        }
        catch(Exception e)
        {
            Debug.Log(e.ToString());
        }
    }

    private static System.Drawing.Icon CustomTrayIcon(string iconPath, int width, int height)
    {
        System.Drawing.Bitmap bt = new System.Drawing.Bitmap(iconPath);

        System.Drawing.Bitmap fitSizeBt = new System.Drawing.Bitmap(bt, width, height);

        return System.Drawing.Icon.FromHandle(fitSizeBt.GetHicon());
    }

    private void notifyIcon_MouseClick(object sender, System.Windows.Forms.MouseEventArgs e)//      
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            _notifyIcon.MouseDoubleClick -= notifyIcon_MouseClick;

            _notifyIcon.Visible = false;

            ShowWindow(window, SW_RESTORE);
        }
    }

    private void OnDestroy()
    {
        _notifyIcon.MouseDoubleClick -= notifyIcon_MouseClick;
    }
}