Unity game window minimizes, maximizes and hides the title bar

Effect

code

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

public class WindowsStyle : MonoBehaviour
{
    
    
    public Button hideBarBtn;
    public Button showBarBtn;
    public Button hideCloseBtn;
    public Button showCloseBtn;
    public Button showMaxSizeBtn;


    private void Awake()
    {
    
    
        // 获得窗口句柄
        var hwd = GetForegroundWindow();
        // 隐藏标题栏
        hideBarBtn.onClick.AddListener(() =>
        {
    
    
            var wl = GetWindowLong(hwd, GWL_STYLE);
            wl &= ~WS_CAPTION;
            SetWindowLong(hwd, GWL_STYLE, wl);
        });
        // 显示标题栏
        showBarBtn.onClick.AddListener(() =>
        {
    
    
            var wl = GetWindowLong(hwd, GWL_STYLE);
            wl |= WS_CAPTION;
            SetWindowLong(hwd, GWL_STYLE, wl);
        });
        // 隐藏关闭按钮
        hideCloseBtn.onClick.AddListener(() =>
        {
    
    
            var wl = GetWindowLong(hwd, GWL_STYLE);
            wl &= ~WS_SYSMENU;
            SetWindowLong(hwd, GWL_STYLE, wl);
        });
        
        // 显示关闭按钮
        showCloseBtn.onClick.AddListener(() =>
        {
    
    
            var wl = GetWindowLong(hwd, GWL_STYLE);
            wl |= WS_SYSMENU;
            SetWindowLong(hwd, GWL_STYLE, wl);
        });
        
        // 窗口最大化按钮按钮
        showMaxSizeBtn.onClick.AddListener(() =>
        {
    
    
            /// <summary>
			/// 最大化
			/// </summary>
			// 设置窗口最大化
			ShowWindow(hwd, SW_SHOWMAXIMIZED);
        });
		
		/// <summary>
    	/// 点击窗口的x按钮，会执行这个函数
   	 	/// </summary>
 	   private void OnApplicationQuit()
	   {
    
    
        	Application.wantsToQuit += () =>
        	{
    
    
            	// 获得窗口句柄
            	var hwd = GetForegroundWindow();
            	// 设置窗口最小化
            	ShowWindow(hwd, SW_SHOWMINIMIZED);
            	// 阻止程序被关闭
            	return false;
        	};
		}
	}

	//引用windows接口
    [DllImport("user32.dll")]
    public static extern IntPtr GetForegroundWindow();

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

    [DllImport("user32.dll")]
    public static extern long GetWindowLong(IntPtr hwd, int nIndex);

    [DllImport("user32.dll")]
    public static extern void SetWindowLong(IntPtr hwd, int nIndex, long dwNewLong);

    /// <summary>
    /// 最小化
    /// </summary>
    const int SW_SHOWMINIMIZED = 2;

    /// <summary>
    /// 最大化
    /// </summary>
    const int SW_SHOWMAXIMIZED = 3;

    /// <summary>
    /// 还原
    /// </summary>
    const int SW_SHOWRESTORE = 1;

    /// <summary>
    /// 窗口风格
    /// </summary>
    const int GWL_STYLE = -16;
    /// <summary>
    /// 标题栏
    /// </summary>
    const int WS_CAPTION = 0x00c00000;
    /// <summary>
    /// 标题栏按钮
    /// </summary>
    const int WS_SYSMENU = 0x00080000;
}

If it needs to be executed as soon as possible, it is recommended to call the code under the [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)] feature.
Introduction to RuntimeInitializeOnLoadMethod

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