using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms; using System.Diagnostics;using System.Threading;using System.Runtime.InteropServices; namespace T1{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }         [DllImport("User32.dll")]        private static extern void SendMessage(IntPtr hwnd, int msg, int wParam, int lParam);         private void button1_Click(object sender, EventArgs e)        {            Process p = Process.Start("T2.exe");            Thread.Sleep(200);//短暂等待程序启动            IntPtr hWnd=p.MainWindowHandle;            Text = hWnd.ToString();            SendMessage(hWnd, 0, 0, 0);        }    }}