Unity如何在Win10的主屏和扩展屏上显示一个窗口应用程序

我的电脑上多接了一个显示屏，我希望Unity程序显示在主屏和扩展屏上，类似于1*2的拼接屏

using System;
using System.Collections;
using System.Runtime.InteropServices;
using System.Diagnostics;
using UnityEngine;
using System.Xml.Serialization;


    public class MainDisplay : MonoBehaviour
    {
    [DllImport("user32.dll")]
    static extern IntPtr SetWindowLong(IntPtr hwnd, int _nIndex, int dwNewLong);
    //导入设置窗口函数
    [DllImport("user32.dll")]
    public static extern bool SetWindowPos(System.IntPtr hWnd, int hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
    //导入当前活动窗口
    [DllImport("user32.dll")]
    static extern IntPtr GetForegroundWindow();
    [DllImport("user32.dll")]
    public static extern IntPtr GetActiveWindow();
    //显示窗口
    public const uint SWP_SHOWWINDOW = 0x0040;
    const int GWL_STYLE = -16;
    const int WS_BORDER = 1;
    void Start()
    {
        //最后一个参数必须为false，不能直接全屏
        Screen.SetResolution(3240, 1920, false);
        //隐藏标题栏
        SetWindowLong(GetForegroundWindow(), GWL_STYLE, WS_BORDER);

        SetWindowPos(GetActiveWindow(), -1, 0, 0, 3240, 1920, SWP_SHOWWINDOW);
    }

    }