如何在C#中从Windows10Forms获取按钮句柄？

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

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

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

    [DllImport("user32.dll", SetLastError = true)]
    public static extern IntPtr GetDlgItem(IntPtr hDlg, int nIDDlgItem);

    static void Main()
    {
        // 获取窗口句柄
        IntPtr mainWindowHandle = FindWindow(null, "窗口标题");

        // 获取按钮句柄
        IntPtr buttonHandle = FindWindowEx(mainWindowHandle, IntPtr.Zero, "Button", "按钮文本");

        // 或者通过控件ID获取按钮句柄
        // int buttonId = 1234; // 按钮的ID
        // IntPtr buttonHandle = GetDlgItem(mainWindowHandle, buttonId);

        // 使用按钮句柄进行操作
        if (buttonHandle != IntPtr.Zero)
        {
            // 按钮存在，可以进行操作
            // 例如，点击按钮
            SendMessage(buttonHandle, BM_CLICK, IntPtr.Zero, IntPtr.Zero);
        }
        else
        {
            // 按钮不存在
        }
    }
}