C#：使用SendKeys在另一个应用程序中按下按钮，直到patrent应用程序关闭

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

class Program
{
    [DllImport("user32.dll")]
    public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

    [DllImport("user32.dll")]
    public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

    [DllImport("user32.dll")]
    public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

    [DllImport("user32.dll")]
    public static extern IntPtr SetForegroundWindow(IntPtr hWnd);

    const int WM_KEYDOWN = 0x0100;
    const int WM_KEYUP = 0x0101;

    static void Main(string[] args)
    {
        // 查找目标应用程序的窗口句柄
        IntPtr targetWindow = FindWindow(null, "目标应用程序窗口标题");

        if (targetWindow != IntPtr.Zero)
        {
            // 将目标应用程序窗口置于前台
            SetForegroundWindow(targetWindow);

            // 查找按钮控件的句柄
            IntPtr button = FindWindowEx(targetWindow, IntPtr.Zero, "Button", "按钮文本");

            if (button != IntPtr.Zero)
            {
                // 模拟按下按钮
                SendMessage(button, WM_KEYDOWN, 0x0D, 0);
                SendMessage(button, WM_KEYUP, 0x0D, 0);
            }
        }
    }
}