unity打开外部exe，并将其置顶

直接上代码：

调用代码

ProcessStartInfo startinfo1 = new ProcessStartInfo();
startinfo1.FileName = "E:\\fastdds\\run\\" + PlanType + ".exe";
startinfo1.Arguments = winInfo;
pss = Process.Start(startinfo1);

//做延时的原因是window打开exe时会有一定的时间，这个时间立刻执行是获取不到句柄的
Invoke("OpenZhiding",0.5f);

延时代码内容

    public void OpenZhiding()
    {
        hWnd = Zhiding.GetProcessWnd(pss.MainWindowHandle);
        Active();
    }

激活窗口

/// 

    /// 激活窗口
    /// 
    void Active()
    {
        if (KeepForeground)
        {
            ShowWindow(hWnd, 1);
            SetForegroundWindow(hWnd);
            SetWindowPos(hWnd, HWND_TOPMOST, 302, 318, 1575, 591, SWP_NOSIZE | SWP_NOMOVE);
        }
    }

获取句柄等操作 zhiding.cs

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;

public class Zhiding
{
    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 Ptr)
    {
        IntPtr ptrWnd = Ptr;
        uint pid = 0;
        foreach (var item in Process.GetProcesses())
        {
            //User.JiemianPlanModel是启动的exe名称，不包含.exe后缀
            if (item.ProcessName == User.JiemianPlanModel)
            {
                pid = (uint)item.Id;
            }
        }
        MgrTips.Instance.ShowTip(pid.ToString());
        bool bResult = EnumWindows(new WNDENUMPROC(delegate (IntPtr hwnd, uint lParam)
        {
            uint id = 0;
            if (GetParent(hwnd) == IntPtr.Zero)
            {
                GetWindowThreadProcessId(hwnd, ref id);
                if (id == lParam)    // 找到进程对应的主窗口句柄  
                {
                    ptrWnd = hwnd;   // 把句柄缓存起来  
                    MgrTips.Instance.ShowTip(ptrWnd.ToString());
                    SetLastError(0);    // 设置无错误  
                    return false;   // 返回 false 以终止枚举窗口  
                }
            }
            return true;

        }), pid);
        return  (!bResult && Marshal.GetLastWin32Error() == 0) ? ptrWnd : IntPtr.Zero;
    }
}