ChivaFrameWork/Framework/Toolkits/Windows/HandleManager.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using UnityEngine;

public class HandleManager
{
    public delegate bool WNDENUMPROC(IntPtr hwnd, uint lParam);  
    [DllImport("user32.dll", SetLastError = true)]  
    public static extern bool EnumWindows(WNDENUMPROC lpEnumFunc, uint lParam);  
  
    [DllImport("user32.dll", SetLastError = true)]  
    public static extern IntPtr GetParent(IntPtr hWnd); 
    
    [DllImport("user32.dll")]  
    public static extern uint GetWindowThreadProcessId(IntPtr hWnd, ref uint lpdwProcessId);  

    [DllImport("kernel32.dll")]  
    public static extern void SetLastError(uint dwErrCode);

    public static IntPtr GetProcessWnd()
    {  
        IntPtr ptrWnd = IntPtr.Zero;
        // 当前进程 ID
        uint pid = (uint)Process.GetCurrentProcess().Id;  
 
        bool bResult = EnumWindows(new WNDENUMPROC(delegate (IntPtr hwnd, uint lParam)
        {  
            uint id = 0;  
            if (GetParent(hwnd) == IntPtr.Zero)
            {
                GetWindowThreadProcessId(hwnd, ref id);
                // 找到进程对应的主窗口句柄
                if (id == lParam)      
                {
                    // 把句柄缓存起来
                    ptrWnd = hwnd;
                    // 设置无错误 
                    SetLastError(0);
                    // 返回 false 以终止枚举窗口 
                    return false;  
                }
            }
 
            return true;  
  
        }), pid);
 
        return (!bResult && Marshal.GetLastWin32Error() == 0) ? ptrWnd : IntPtr.Zero;
    }  
}